PDL::Graphics::PLplot - Object-oriented interface from perl/PDL to the PLPLOT plotting library

  use PDL;
  use PDL::Graphics::PLplot;

  my $pl = PDL::Graphics::PLplot->new (DEV => "png", FILE => "test.png");
  my $x  = sequence(1);
  my $y  = $x**2;
  $pl->xyplot($x, $y);
  $pl->close;

For more information on PLplot, see

 http://www.plplot.org/

Also see the test file, t/plplot.pl in this distribution for some working examples.

This is the PDL interface to the PLplot graphics library. It is designed to be simple and light weight with a familiar 'perlish' Object Oriented interface.

The following options are supported. Most options can be used with any function. A few are only supported on the call to 'new'.

BACKGROUND

Set the color for index 0, the plot background

DEV

Set the output device type. To see a list of allowed types, try:

  PDL::Graphics::PLplot->new();

   PDL::Graphics::PLplot->new(DEV => 'png', FILE => 'test.png');

FILE

Set the output file or display. For file output devices, sets the output file name. For graphical displays (like CW'xwin') sets the name of the display, eg (CW'hostname.foobar.com:0')

   PDL::Graphics::PLplot->new(DEV => 'png',  FILE => 'test.png');
   PDL::Graphics::PLplot->new(DEV => 'xwin', FILE => ':0');

MEM

This option is used in conjunction with CWDEV => 'mem'. This option takes as input a PDL image and allows one to 'decorate' it using PLplot. The 'decorated' PDL image can then be written to an image file using, for example, PDL::IO::Pic. This option may not be available if plplot does not include the 'mem' driver.

  # read in Earth image and draw an equator.
  my $pl = PDL::Graphics::PLplot->new (MEM => $earth, DEV => 'mem');
  my $x  = pdl(-180, 180);
  my $y  = zeroes(2);
  $pl->xyplot($x, $y,
              BOX => [-180,180,-90,90],
              VIEWPORT => [0.0, 1.0, 0.0, 1.0],
              XBOX => '', YBOX => '',
              PLOTTYPE => 'LINE');
  $pl->close;

FRAMECOLOR

Set color index 1, the frame color

JUST

A flag used to specify equal scale on the axes. If this is not specified, the default is to scale the axes to fit best on the page.

  PDL::Graphics::PLplot->new(DEV => 'png',  FILE => 'test.png', JUST => 1);

ORIENTATION

The orientation of the plot:

  0 --   0 degrees (landscape mode)
  1 --  90 degrees (portrait mode)
  2 -- 180 degrees (seascape mode)
  3 -- 270 degrees (upside-down mode)

Intermediate values (0.2) are acceptable if you are feeling daring.

  # portrait orientation
  PDL::Graphics::PLplot->new(DEV => 'png',  FILE => 'test.png', ORIENTATION => 1);

PAGESIZE

Set the size in pixels of the output page.

  # PNG 500 by 600 pixels
  PDL::Graphics::PLplot->new(DEV => 'png',  FILE => 'test.png', PAGESIZE => [500,600]);

SUBPAGES

Set the number of sub pages in the plot, [$nx, CW$ny]

  # PNG 300 by 600 pixels
  # Two subpages stacked on top of one another.
  PDL::Graphics::PLplot->new(DEV => 'png',  FILE => 'test.png', PAGESIZE => [300,600],
                                              SUBPAGES => [1,2]);

BOX

Set the plotting box in world coordinates. Used to explicitly set the size of the plotting area.

 my $pl = PDL::Graphics::PLplot->new(DEV => 'png',  FILE => 'test.png');
 $pl->xyplot ($x, $y, BOX => [0,100,0,200]);

CHARSIZE

Set the size of text in multiples of the default size. CWCHARSIZE => 1.5 gives characters 1.5 times the normal size.

COLOR

Set the current color for plotting and character drawing. Colors are specified not as color indices but as RGB triples. Some pre-defined triples are included:

  BLACK        GREEN        WHEAT        BLUE
  RED          AQUAMARINE   GREY         BLUEVIOLET
  YELLOW       PINK         BROWN        CYAN
  TURQUOISE    MAGENTA      SALMON       WHITE

 # These two are equivalent:
 $pl->xyplot ($x, $y, COLOR => 'YELLOW');
 $pl->xyplot ($x, $y, COLOR => [0,255,0]);

LINEWIDTH

Set the line width for plotting. Values range from 1 to a device dependent maximum.

LINESTYLE

Set the line style for plotting. Pre-defined line styles use values 1 to 8, one being a solid line, 2-8 being various dashed patterns.

MAJTICKSIZE

Set the length of major ticks as a fraction of the default setting. One (default) means leave these ticks the normal size.

MINTICKSIZE

Set the length of minor ticks (and error bar terminals) as a fraction of the default setting. One (default) means leave these ticks the normal size.

NXSUB

The number of minor tick marks between each major tick mark on the X axis. Specify zero (default) to let PLplot compute this automatically.

NYSUB

The number of minor tick marks between each major tick mark on the Y axis. Specify zero (default) to let PLplot compute this automatically.

PALETTE

Load pre-defined color map 1 color ranges. Currently, values include:

  RAINBOW   -- from Red to Violet through the spectrum
  REVERSERAINBOW   -- Violet through Red
  GREYSCALE -- from black to white via grey.
  REVERSEGREYSCALE -- from white to black via grey.
  GREENRED  -- from green to red
  REDGREEN  -- from red to green

 # Plot x/y points with the z axis in color
 $pl->xyplot ($x, $y, PALETTE => 'RAINBOW', PLOTTYPE => 'POINTS', COLORMAP => $z);

PLOTTYPE

Specify which type of XY plot is desired:

  LINE       -- A line
  POINTS     -- A bunch of symbols
  LINEPOINTS -- both

SUBPAGE

Set which subpage to plot on. Subpages are numbered 1 to N. A zero can be specified meaning 'advance to the next subpage' (just a call to pladv()).

  my $pl = PDL::Graphics::PLplot->new(DEV      => 'png',
                                        FILE     => 'test.png',
                                        SUBPAGES => [1,2]);
  $pl->xyplot ($x, $y, SUBPAGE => 1);
  $pl->xyplot ($a, $b, SUBPAGE => 2);

SYMBOL

Specify which symbol to use when plotting CWPLOTTYPE => 'POINTS'. A large variety of symbols are available, see: http://plplot.sourceforge.net/examples-data/demo07/x07.*.png, where * is 01 - 17.

SYMBOLSIZE

Specify the size of symbols plotted in multiples of the default size (1). Value are real numbers from 0 to large.

TEXTPOSITION

Specify the placement of text. Either relative to border, specified as:

 [$side, $disp, $pos, $just]

Where

  side = 't', 'b', 'l', or 'r' for top, bottom, left and right
  disp is the number of character heights out from the edge
  pos  is the position along the edge of the viewport, from 0 to 1.
  just tells where the reference point of the string is: 0 = left, 1 = right, 0.5 = center.

or inside the plot window, specified as:

 [$x, $y, $dx, $dy, $just]

Where

  x  = x coordinate of reference point of string.
  y  = y coordinate of reference point of string.
  dx   Together with dy, this specifies the inclination of the string.
       The baseline of the string is parallel to a line joining (x, y) to (x+dx, y+dy).
  dy   Together with dx, this specifies the inclination of the string.
  just Specifies the position of the string relative to its reference point.
       If just=0, the reference point is at the left and if just=1,
       it is at the right of the string. Other values of just give
       intermediate justifications.

 # Plot text on top of plot
 $pl->text ("Top label",  TEXTPOSITION => ['t', 4.0, 0.5, 0.5]);

 # Plot text in plotting area
 $pl->text ("Line label", TEXTPOSITION => [50, 60, 5, 5, 0.5]);

TITLE

Add a title on top of a plot.

 # Plot text on top of plot
 $pl->xyplot ($x, $y, TITLE => 'X vs. Y');

VIEWPORT

Set the location of the plotting window on the page. Takes a four element array ref specifying:

 xmin -- The coordinate of the left-hand edge of the viewport. (0 to 1)
 xmax -- The coordinate of the right-hand edge of the viewport. (0 to 1)
 ymin -- The coordinate of the bottom edge of the viewport. (0 to 1)
 ymax -- The coordinate of the top edge of the viewport. (0 to 1)

 # Make a small plotting window in the lower left of the page
 $pl->xyplot ($x, $y, VIEWPORT => [0.1, 0.5, 0.1, 0.5]);

 # Also useful in creating color keys:
 $pl->xyplot   ($x, $y, PALETTE => 'RAINBOW', PLOTTYPE => 'POINTS', COLORMAP => $z);
 $pl->colorkey ($z, 'v', VIEWPORT => [0.93, 0.96, 0.15, 0.85]);

XBOX

Specify how to label the X axis of the plot as a string of option letters:

  a: Draws axis, X-axis is horizontal line (y=0), and Y-axis is vertical line (x=0).
  b: Draws bottom (X) or left (Y) edge of frame.
  c: Draws top (X) or right (Y) edge of frame.
  f: Always use fixed point numeric labels.
  g: Draws a grid at the major tick interval.
  h: Draws a grid at the minor tick interval.
  i: Inverts tick marks, so they are drawn outwards, rather than inwards.
  l: Labels axis logarithmically. This only affects the labels, not the data,
     and so it is necessary to compute the logarithms of data points before
     passing them to any of the drawing routines.
  m: Writes numeric labels at major tick intervals in the
     unconventional location (above box for X, right of box for Y).
  n: Writes numeric labels at major tick intervals in the conventional location
     (below box for X, left of box for Y).
  s: Enables subticks between major ticks, only valid if t is also specified.
  t: Draws major ticks.

The default is CW'BCNST' which draws lines around the plot, draws major and minor ticks and labels major ticks.

 # plot two lines in a box with independent X axes labeled
 # differently on top and bottom
 $pl->xyplot($x1, $y, XBOX  => 'bnst',  # bottom line, bottom numbers, ticks, subticks
                      YBOX  => 'bnst'); # left line, left numbers, ticks, subticks
 $pl->xyplot($x2, $y, XBOX => 'cmst', # top line, top numbers, ticks, subticks
                      YBOX => 'cst',  # right line, ticks, subticks
                      BOX => [$x2->minmax, $y->minmax]);

XERRORBAR

Used only with xyplot. Draws horizontal error bars at all points (CW$x, CW$y) in the plot. Specify a PDL containing the same number of points as CW$x and CW$y which specifies the width of the error bar, which will be centered at (CW$x, CW$y).

XLAB

Specify a label for the X axis.

XTICK

Interval (in graph units/world coordinates) between major x axis tick marks. Specify zero (default) to allow PLplot to compute this automatically.

YBOX

Specify how to label the Y axis of the plot as a string of option letters. See XBOX.

YERRORBAR

Used only for xyplot. Draws vertical error bars at all points (CW$x, CW$y) in the plot. Specify a PDL containing the same number of points as CW$x and CW$y which specifies the width of the error bar, which will be centered at (CW$x, CW$y).

YLAB

Specify a label for the Y axis.

YTICK

Interval (in graph units/world coordinates) between major y axis tick marks. Specify zero (default) to allow PLplot to compute this automatically.

ZRANGE

For xyplot (when CWCOLORMAP is specified), for shadeplot and for colorkey. Normally, the range of the Z variable (color) is taken as CW$z->minmax. If a different range is desired, specify it in CWZRANGE, like so:

  $pl->shadeplot ($z, $nlevels, PALETTE => 'GREENRED', ZRANGE => [0,100]);

or

  $pl->xyplot ($x, $y, PALETTE  => 'RAINBOW', PLOTTYPE => 'POINTS',
                       COLORMAP => $z,        ZRANGE => [-90,-20]);
  $pl->colorkey  ($z, 'v', VIEWPORT => [0.93, 0.96, 0.13, 0.85],
                       ZRANGE => [-90,-20]);

Create an object representing a plot.

 Arguments:
 none.

 Supported options:
 BACKGROUND
 DEV
 FILE
 FRAMECOLOR
 JUST
 PAGESIZE
 SUBPAGES

  my $pl = PDL::Graphics::PLplot->new(DEV => 'png',  FILE => 'test.png');

Set options for a plot object.

 Arguments:
 none.

 Supported options:
 All options except:

 BACKGROUND
 DEV
 FILE
 FRAMECOLOR
 JUST
 PAGESIZE
 SUBPAGES

 (These must be set in call to 'new'.)

  $pl->setparm (TEXTSIZE => 2);

Plot XY lines and/or points. Also supports color scales for points. This function works with bad values. If a bad value is specified for a points plot, it is omitted. If a bad value is specified for a line plot, the bad value makes a gap in the line. This is useful for drawing maps; for example CW$x and CW$y can be the continent boundary latitude and longitude.

 Arguments:
 $x, $y

 Supported options:
 All options except:

 BACKGROUND
 DEV
 FILE
 FRAMECOLOR
 JUST
 PAGESIZE
 SUBPAGES

 (These must be set in call to 'new'.)

  $pl->xyplot($x, $y, PLOTTYPE => 'POINTS', COLOR => 'BLUEVIOLET', SYMBOL => 1, SYMBOLSIZE => 4);
  $pl->xyplot($x, $y, PLOTTYPE => 'LINEPOINTS', COLOR => [50,230,30]);
  $pl->xyplot($x, $y, PALETTE => 'RAINBOW', PLOTTYPE => 'POINTS', COLORMAP => $z);

Plot a color key showing which color represents which value

 Arguments:
 $range   : A PDL which tells the range of the color values
 $orientation : 'v' for vertical color key, 'h' for horizontal

 Supported options:
 All options except:

 BACKGROUND
 DEV
 FILE
 FRAMECOLOR
 JUST
 PAGESIZE
 SUBPAGES

 (These must be set in call to 'new'.)

  # Plot X vs. Y with Z shown by the color.  Then plot
  # vertical key to the right of the original plot.
  $pl->xyplot ($x, $y, PALETTE => 'RAINBOW', PLOTTYPE => 'POINTS', COLORMAP => $z);
  $pl->colorkey ($z, 'v', VIEWPORT => [0.93, 0.96, 0.15, 0.85]);

Create a shaded contour plot of 2D PDL 'z' with 'nsteps' contour levels. Linear scaling is used to map the coordinates of Z(X, Y) to world coordinates via the BOX option.

 Arguments:
 $z : A 2D PDL which contains surface values at each XY coordinate.
 $nsteps : The number of contour levels requested for the plot.

 Supported options:
 All options except:

 BACKGROUND
 DEV
 FILE
 FRAMECOLOR
 JUST
 PAGESIZE
 SUBPAGES

 (These must be set in call to 'new'.)

  # vertical key to the right of the original plot.
  # The BOX must be specified to give real coordinate values to the $z array.
  $pl->shadeplot ($z, $nsteps, BOX => [-1, 1, -1, 1], PALETTE => 'RAINBOW', ZRANGE => [0,100]);
  $pl->colorkey  ($z, 'v', VIEWPORT => [0.93, 0.96, 0.15, 0.85], ZRANGE => [0,100]);

Create a histogram of a 1-D variable.

 Arguments:
 $x : A 1D PDL
 $nbins : The number of bins to use in the histogram.

 Supported options:
 All options except:

 BACKGROUND
 DEV
 FILE
 FRAMECOLOR
 JUST
 PAGESIZE
 SUBPAGES

 (These must be set in call to 'new'.)

  $pl->histogram ($x, $nbins, BOX => [$min, $max, 0, 100]);

Write text on a plot. Text can either be written with respect to the borders or at an arbitrary location and angle (see the TEXTPOSITION entry).

 Arguments:
 $t : The text.

 Supported options:
 All options except:

 BACKGROUND
 DEV
 FILE
 FRAMECOLOR
 JUST
 PAGESIZE
 SUBPAGES

 (These must be set in call to 'new'.)

  $pl->text("Count", COLOR => 'PINK',
            TEXTPOSITION => ['t', 3, 0.5, 0.5]); # top, 3 units out, string ref. pt in
                                                 # center of string, middle of axis

Close a PLplot object, writing out the file and cleaning up.

Arguments: None

Returns: Nothing

This closing of the PLplot object can be done explicitly though the 'close' method. Alternatively, a DESTROY block does an automatic close whenever the PLplot object passes out of scope.

  $pl->close;

The PDL low-level interface to the PLplot library closely mimics the C API. Users are referred to the PLplot User's Manual, distributed with the source PLplot tarball. This manual is also available on-line at the PLplot web site (<http://www.plplot.org/>).

There are though two differences in way the functions are called. The first one is due to a limitation in the pp_def wrapper of PDL, which forces all the non-piddle arguments to be at the end of the arguments list. It is the case of strings (CWchar *) arguments in the C API. This affects the following functions [shown below with their prototypes in PDL, with arguments preceded by (pdl) are piddle-convertible; see the PLplot manual for the meaning of the arguments]:

  plaxes ((pdl) x0, (pdl) y0, (pdl) xtick, (pdl) nxsub, (pdl) ytick,
          (pdl) nysub, (string) xopt, (string (yopt))
  plbox ((pdl) xtick, (pdl) nxsub, (pdl) ytick, (pdl) nysub,
         (string) xopt, (string) yopt)
  plbox3 ((pdl) xtick, (pdl) nsubx, (pdl) ytick, (pdl) nsuby,
          (pdl) ztick, (pdl) nsubz, (string) xopt, (string) xlabel,
          (string) yopt, (string) ylabel, (string) zopt,
          (string) zlabel)
  plmtex ((pdl) disp, (pdl) pos, (pdl) just, (string) side),
          (string) text);
  plstart ((pdl) nx, (pdl) ny, (string) devname);

The second notable different between the C and the PDL APIs is that many of the PDL calls do not need arguments to specify the size of the the vectors and/or matrices being passed. This size parameters are deduced from the size of the piddles, when possible. For now, the following interfaces are affected:

  plcont (f, kx, lx, ky, ly, clevel)
  plfill (x, y)
  plhist (data, datmin, datmax, nbin, oldwin)
  plline (x, y)
  plline3 (x, y, z)
  plpoly3 (x, y, z, draw, ifcc)
  plmesh (x, y, z, opt)
  plmeshc (x, y, z, opt, clevel)
  plot3d (x, y, z, opt, side)
  plpoin (x, y, code)
  plpoin3 (x, y, z, code)
  plscmap1l (itype, intensity, coord1, coord2, coord3, rev)
  plstyl (mark, space)
  plsym (x, y, code)

Some of the API functions implemented in PDL have other specificities in comparison with the C API and will be discussed below.

  Signature: (int page())

info not available

pladv does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double u(dima);double v(dima);double x(dima);double y(dima);int n();double scale();double dx();double dy())

info not available

plarrows does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xzero();double yzero();double xtick();int nxsub();double ytick();int nysub(); char *xopt;char *yopt)

info not available

plaxes does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int nbin();double x(dima);double y(dima);int center())

info not available

plbin does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xtick();int nxsub();double ytick();int nysub(); char *xopt;char *yopt)

info not available

plbox does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xtick();int nsubx();double ytick();int nsuby();double ztick();int nsubz(); char *xopt;char *xlabel;char *yopt;char *ylabel;char *zopt;char *zlabel)

info not available

plbox3 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int icolzero())

info not available

plcol0 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double colone())

info not available

plcol1 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int iplsr();int flags())

info not available

plcpstrm does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin(dima);double ymin(dima);double xmax(dima);double ymax(dima))

info not available

pldid2pc does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin(dima);double ymin(dima);double xmax(dima);double ymax(dima))

info not available

pldip2dc does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin();double xmax();double ymin();double ymax();int just();int axis())

info not available

plenv does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin();double xmax();double ymin();double ymax();int just();int axis())

info not available

plenv0 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int n();double xmin(dima);double xmax(dima);double y(dima))

info not available

plerrx does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int n();double x(dima);double ymin(dima);double ymax(dima))

info not available

plerry does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int n();double x(dima);double y(dima);double z(dima))

info not available

plfill3 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int ifont())

info not available

plfont does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int fnt())

info not available

plfontld does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double [o]p_def(dima);double [o]p_ht(dima))

info not available

plgchr does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int [o]icolzero();int [o]r(dima);int [o]g(dima);int [o]b(dima))

info not available

plgcol0 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int [o]r(dima);int [o]g(dima);int [o]b(dima))

info not available

plgcolbg does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int [o]compression(dima))

info not available

plgcompression does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double [o]p_mar(dima);double [o]p_aspect(dima);double [o]p_jx(dima);double [o]p_jy(dima))

info not available

plgdidev does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double [o]p_rot(dima))

info not available

plgdiori does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double [o]p_xmin(dima);double [o]p_ymin(dima);double [o]p_xmax(dima);double [o]p_ymax(dima))

info not available

plgdiplt does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int [o]p_fam(dima);int [o]p_num(dima);int [o]p_bmax(dima))

info not available

plgfam does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int [o]p_level(dima))

info not available

plglevel does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double [o]p_xp(dima);double [o]p_yp(dima);int [o]p_xleng(dima);int [o]p_yleng(dima);int [o]p_xoff(dima);int [o]p_yoff(dima))

info not available

plgpage does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double [o]xmin(dima);double [o]xmax(dima);double [o]ymin(dima);double [o]ymax(dima))

info not available

plgspa does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int [o]p_digmax(dima);int [o]p_digits(dima))

info not available

plgxax does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int [o]p_digmax(dima);int [o]p_digits(dima))

info not available

plgyax does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int [o]p_digmax(dima);int [o]p_digits(dima))

info not available

plgzax does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double h();double l();double s())

info not available

plhls does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xone();double yone();double xtwo();double ytwo())

info not available

pljoin does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double x();double y();double z())

info not available

pllightsource does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int lin())

info not available

pllsty does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double disp();double pos();double just(); char *side;char *text)

info not available

plmtex does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int nlin();int inc(dima);int del(dima))

info not available

plpat does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int setp();int prec())

info not available

plprec does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int patt())

info not available

plpsty does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double x();double y();double dx();double dy();double just(); char *text)

info not available

plptex does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double r();double g();double b())

info not available

plrgb does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int r();int g();int b())

info not available

plrgb1 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double def();double scale())

info not available

plschr does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int ncolzero())

info not available

plscmap0n does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int ncolone())

info not available

plscmap1n does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int r(dima);int g(dima);int b(dima);int ncolzero())

info not available

plscmap0 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int r(dima);int g(dima);int b(dima);int ncolone())

info not available

plscmap1 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int icolzero();int r();int g();int b())

info not available

plscol0 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int r();int g();int b())

info not available

plscolbg does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int color())

info not available

plscolor does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int compression())

info not available

plscompression does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double mar();double aspect();double jx();double jy())

info not available

plsdidev does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int dimxmin();int dimxmax();int dimymin();int dimymax();double dimxpmm();double dimypmm())

info not available

plsdimap does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double rot())

info not available

plsdiori does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin();double ymin();double xmax();double ymax())

info not available

plsdiplt does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin();double ymin();double xmax();double ymax())

info not available

plsdiplz does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double offset();double size();double spacing();int active())

info not available

pl_setcontlabelparam does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int lexp();int sigdig())

info not available

pl_setcontlabelformat does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int fam();int num();int bmax())

info not available

plsfam does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double def();double scale())

info not available

plsmaj does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double def();double scale())

info not available

plsmin does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int ori())

info not available

plsori does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xp();double yp();int xleng();int yleng();int xoff();int yoff())

info not available

plspage does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int pause())

info not available

plspause does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int strm())

info not available

plsstrm does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int nx();int ny())

info not available

plssub does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double def();double scale())

info not available

plssym does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int nx();int ny())

info not available

plstar does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int nx();int ny(); char *devname)

info not available

plstart does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int id();int pen();double x();double y())

info not available

plstripa does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int id())

info not available

plstripd does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin();double xmax();double ymin();double ymax())

info not available

plsvpa does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int digmax();int digits())

info not available

plsxax does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int window_id())

info not available

plsxwin does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int digmax();int digits())

info not available

plsyax does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int digmax();int digits())

info not available

plszax does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double aspect())

info not available

plvasp does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin();double xmax();double ymin();double ymax();double aspect())

info not available

plvpas does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin();double xmax();double ymin();double ymax())

info not available

plvpor does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double basex();double basey();double height();double xminzero();double xmaxzero();double yminzero();double ymaxzero();double zminzero();double zmaxzero();double alt();double az())

info not available

plw3d does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int width())

info not available

plwid does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xmin();double xmax();double ymin();double ymax())

info not available

plwind does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double p_x(dima);double p_y(dima))

info not available

plP_gpixmm does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n))

info not available

plline does handle bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(n); int sym(); minz(); maxz())

info not available

plcolorpoints does handle bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int maxx();int maxy();image(3,x,y))

info not available

plsmem does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (xo(); yo())

info not available

plfbox does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int [o] retval(); SV* argv; int mode)

FIXME: documentation here!

plParseOpts does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); int code())

info not available

plpoin does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(n); int code())

info not available

plpoin3 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(n))

info not available

plline3 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(n); int draw(m); int ifcc())

info not available

plpoly3 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (data(n); datmin(); datmax(); int nbin(); int oldwin())

info not available

plhist does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n))

info not available

plfill does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); int code())

info not available

plsym does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(nx,ny); int opt(); clevel(n))

info not available

plsurf3d does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int mark(n); int space(n))

info not available

plstyl does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xg(n); double yg(n); int [o] grid())

FIXME: documentation here!

plAllocGrid does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (double xg(nx,ny); double yg(nx,ny); int [o] grid())

FIXME: documentation here!

plAlloc2dGrid does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (P(); C(); SV* p0; SV* p1; SV* p2)

FIXME: documentation here!

init_pltr does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (minlong(); maxlong(); minlat(); maxlat(); SV* mapform; char* type)

info not available

plmap does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (dlong(); dlat(); minlong(); maxlong(); minlat(); maxlat(); SV* mapform)

info not available

plmeridians does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (z(x,y); xmin(); xmax(); ymin(); ymax();
                  clevel(l); int fill_width(); int cont_color();
                  int cont_width(); int rectangular(); SV* defined; SV* pltr; SV* pltr_data)

info not available

plshades does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (f(nx,ny); int kx(); int lx(); int ky(); int ly(); clevel(n); SV* pltr; SV* pltr_data)

FIXME: documentation here!

plcont does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(nx,ny); int opt())

FIXME: documentation here!

plmesh does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(nx,ny); int opt(); clevel(n))

FIXME: documentation here!

plmeshc does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(nx,ny); int opt(); int side())

FIXME: documentation here!

plot3d does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(nx,ny); int opt(); clevel(n))

FIXME: documentation here!

plot3dc does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (int itype(); isty(n); coord1(n); coord2(n); coord3(n); int rev(n))

FIXME: documentation here!

plscmap1l does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (a(nx,ny); left(); right(); bottom(); top(); shade_min();shade_max(); sh_cmap(); sh_color(); sh_width();min_color(); min_width(); max_color(); max_width();rectangular(); SV* defined; SV* pltr; SV* pltr_data)

FIXME: documentation here!

plshade1 does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (idata(nx,ny); xmin(); xmax(); ymin(); ymax();zmin(); zmax(); Dxmin(); Dxmax(); Dymin(); Dymax())

info not available

plimage does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  $status = plxormod ($mode)

See the PLplot manual for reference.

  %gin = plGetCursor ()

plGetCursor waits for graphics input event and translate to world coordinates and returns a hash with the following keys:

    type:      of event (CURRENTLY UNUSED)
    state:     key or button mask
    keysym:    key selected
    button:    mouse button selected
    subwindow: subwindow (alias subpage, alias subplot) number
    string:    translated string
    pX, pY:    absolute device coordinates of pointer
    dX, dY:    relative device coordinates of pointer
    wX, wY:    world coordinates of pointer

Returns an empty hash if no translation to world coordinates is possible.

  $strm = plgstrm ()

Returns the number of the current output stream.

  $driver = plgdev ()

Returns the current driver name.

  $strm = plmkstrm ()

Creates a new stream and makes it the default. Returns the number of the created stream.

  $version = plgver ()

See the PLplot manual for reference.

  Signature: (xmin(); xmax(); xjump(); ymin(); ymax();xlpos(); ylpos(); int y_ascl(); int acc();int colbox(); int collab();int colline(n); int styline(n);  int [o] id(); char* xspec; char* yspec; SV* legline;char* labx; char* laby; char* labtop)

FIXME: documentation here!

plstripc does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (x(n); y(n); z(n); xg(n); yg(n);int type(); data(); [o] zg(nptsx,nptsy))

FIXME: documentation here!

plgriddata does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (u(nx,ny); v(nx,ny); scale(); SV* pltr; SV* pltr_data)

FIXME: documentation here!

plvect does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Signature: (arrowx(n); arrowy(n); int fill())

info not available

plsvect does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.

  Doug Hunt <dhunt@ucar.edu>
  Rafael Laboissiere <rlaboiss@users.sourceforge.net>

perl(1), PDL(1), <http://www.plplot.org/>