Standard Library

closed

DOCUMENT closed=   plotting keyword
      or smooth=   plotting keyword
  selects closed curves (closed=1) or default open curves (closed=0),
  or Bezier smoothing (smooth>0) or default piecewise linear curves
  (smooth=0).  The value of smooth can be 1, 2, 3, or 4 to get
  successively more smoothing.  Only the Bezier control points are
  plotted to an X window; the actual Bezier curves will show up in
  PostScript hardcopy files.  Closed curves join correctly, which
  becomes more noticeable for wide lines; non-solid closed curves
  may look bad because the dashing pattern may be incommensurate
  with the length of the curve.
PLOTTING COMMANDS: plg, plc (smooth only)

SEE ALSO: type, width, color, marks, marker, rays

color

DOCUMENT color=   plotting keyword
  selects line or text color.  Valid values are the strings "bg", "fg",
  "black", "white", "red", "green", "blue", "cyan", "magenta", "yellow",
  or a 0-origin index into the current palette.  The default is "fg".
  Negative numbers may be used instead of the strings: -1 is bg
  (background), -2 is fg (foreground), -3 is black, -4 is white,
  -5 is red, -6 is green, -7 is blue, -8 is cyan, -9 is magenta, and
  -10 is yellow.  (The negative numbers are actually taken modulo
  256, so -1 is also 255, -2 is 254, and so on.)

  A color can also be a triple [r, g, b], with values running from
  0 for dark to 255 for full intensity.  Beware, however, of
  specifying an rgb color (either as a color keyword or to the
  plf, pli, or plfp commands) if your display is not a true color
  display (for example, if it is 8 bits deep or less).  In that
  case, it may switch to a 5x9x5 color cube, which causes a
  significant degradation in quality of rendering with smooth
  color palettes.  Furthermore, the hcp command will not work
  properly for rgb colors if the file is a CGM.  Use the rgb=1
  keyword in the window command to avoid having to re-issue a
  palette command after the first rgb object is drawn (this is
  unnecessary on true color screens).

PLOTTING COMMANDS: plg, plm, plc, pldj, plt

SEE ALSO: type, width, marks, marker, mcolor, rays, closed, smooth

edges

DOCUMENT edges=   plotting keyword
      or ecolor=   plotting keyword
      or ewidth=   plotting keyword
  set the appearance of zone edges in a filled mesh plot (plf or plfp).
  By default, edges=0, and the zone edges are not plotted.  If
  edges=1, a solid line is drawn around each zone after it is
  filled; the edge color and width are given by ecolor and ewidth,
  which are "fg" and 1.0 by default.
PLOTTING COMMANDS: plf

SEE ALSO: color, width

font

DOCUMENT font=     plotting keyword
      or height=   plotting keyword
      or opaque=   plotting keyword
      or orient=   plotting keyword
      or justify=  plotting keyword
  selects text properties.  The font can be any of the strings
  "courier", "times", "helvetica" (the default), "symbol", or
  "schoolbook".  Append "B" for boldface and "I" for italic, so
  "courierB" is boldface Courier, "timesI" is Times italic, and
  "helveticaBI" is bold italic (oblique) Helvetica.  Your X server
  should have the Adobe fonts (available free from the MIT X
  distribution tapes) for all these fonts, preferably at both 75
  and 100 dpi.  Occasionally, a PostScript printer will not be
  equipped for some fonts; often New Century Schoolbook is missing.
  The font keyword may also be an integer: 0 is Courier, 4 is Times,
  8 is Helvetica, 12 is Symbol, 16 is New Century Schoolbook, and
  you add 1 to get boldface and/or 2 to get italic (or oblique).

  The height is the font size in points; 14.0 is the default.
  X windows only has 8, 10, 12, 14, 18, and 24 point fonts, so
  don't stray from these sizes if you want what you see on the
  screen to be a reasonably close match to what will be printed.

  By default, opaque=0 and text is transparent.  Set opaque=1 to
  white-out a box before drawing the text.  The default orient
  (orient=0) is left-to-right text; set orient=1 for text rotated 90
  degrees so it reads upward, orient=2 for 180 degree rotation so
  it is upside down, and orient=3 for 270 degree rotation so it
  reads downward.

  The default text justification, justify="NN" is normal is both
  the horizontal and vertical directions.  Other possibilities
  are "L", "C", or "R" for the first character, meaning left,
  center, and right horizontal justification, and "T", "C", "H",
  "A", or "B", meaning top, capline, half, baseline, and bottom
  vertical justification.  The normal justification "NN" is equivalent
  to "LA".  Common values are "LA", "CA", and "RA" for garden variety
  left, center, and right justified text, with the y coordinate at the
  baseline of the last line in the string presented to plt.  The
  characters labeling the right axis of a plot are "RH", so that the
  y value of the text will match the y value of the corresponding
  tick.  Similarly, the characters labeling the bottom axis of a plot
  are "CT".  The justify= may also be a number, horizontal+vertical,
  where horizontal is 0 for "N", 1 for "L", 2 for "C", or 3 for "R",
  and vertical is 0 for "N", 4 for "T", 8 for "C", 12 for "H",
  16 for "A", or 20 for "B".

PLOTTING COMMANDS: plt

SEE ALSO: color

hide

DOCUMENT hide=   plotting keyword
  sets the visibility of a plotted element.  The default is hide=0,
  which means that the element will be visible.  Use hide=1 to remove
  the element from the plot (but not from the display list).
PLOTTING COMMANDS: plg, plm, plc, plv, plf, pli, plt, pldj

SEE ALSO: legend

hollow

DOCUMENT hollow=   plotting keyword
      or aspect=   plotting keyword
  set the appearance of the "darts" of a vector field plot.  The
  default darts, hollow=0, are filled; use hollow=1 to get just the
  dart outlines.  The default is aspect=0.125; aspect is the ratio
  of the half-width to the length of the darts.  Use the color
  keyword to control the color of the darts.
PLOTTING COMMANDS: plv

SEE ALSO: color

legend

DOCUMENT legend=   plotting keyword
  sets the legend for a plot.  The default legend is a concatentation
  of the strings used in the original plotting command (plg, plm, etc.),
  except for the plt command, which has no default legend.
  Legends are never plotted to the X window; use the plq command to
  see them interactively.  Legends will appear in hardcopy output
  unless they have been explicitly turned off.
PLOTTING COMMANDS: plg, plm, plc, plv, plf, pli, plt, pldj

SEE ALSO: hide

marker

DOCUMENT marker=   plotting keyword
  selects the character used for occasional markers along a polyline,
  or for the polymarker if type is "none".  The special values
  '\1', '\2', '\3', '\4', and '\5' stand for point, plus, asterisk,
  circle, and cross, which are prettier than text characters on output
  to some devices.  The default marker is the next available capital
  letter, 'A', 'B', ..., 'Z'.
PLOTTING COMMANDS: plg, plc

SEE ALSO: type, width, color, marks, rays, mspace, mphase, msize, mcolor

marks

DOCUMENT marks=   plotting keyword
  selects unadorned lines (marks=0), or lines with occasional markers
  (marks=1).  Ignored if type is "none" (indicating polymarkers instead
  of occasional markers).  The spacing and phase of the occasional
  markers can be altered using the mspace and mphase keywords; the
  character used to make the mark can be altered using the marker
  keyword.
PLOTTING COMMANDS: plg, plc

SEE ALSO: type, width, color, marker, rays, mspace, mphase, msize, mcolor

mspace

DOCUMENT mspace=   plotting keyword
      or mphase=   plotting keyword
      or msize=    plotting keyword
      or mcolor=   plotting keyword
  selects the spacing, phase, and size of occasional markers placed
  along polylines.  The msize also selects polymarker size if type
  is "none".  The spacing and phase are in NDC units (0.0013 NDC
  equals 1.0 point); the default mspace is 0.16, and the default
  mphase is 0.14, but mphase is automatically incremented for
  successive curves on a single plot.  The msize is in relative
  units, with the default msize of 1.0 representing 10 points.
  The mcolor keyword is the same as the color keyword, but controls
  the marker color instead of the line color.  Setting the color
  automatically sets the mcolor to the same value, so you only
  need to use mcolor if you want the markers for a curve to be a
  different color than the curve itself.
PLOTTING COMMANDS: plg, plc

SEE ALSO: type, width, color, marks, marker, rays

rays

DOCUMENT rays=   plotting keyword
  selects unadorned lines (rays=0), or lines with occasional ray
  arrows (rays=1).  Ignored if type is "none".  The spacing and phase
  of the occasional arrows can be altered using the rspace and rphase
  keywords; the shape of the arrowhead can be modified using the
  arroww and arrowl keywords.
PLOTTING COMMANDS: plg, plc

SEE ALSO: type, width, color, marker, marks, rspace, rphase, arroww, arrowl

region

DOCUMENT region=   plotting keyword
  selects the part of mesh to consider.  The region should match one
  of the numbers in the IREG array.  Putting region=0 (the default)
  means to plot the entire mesh, that is, everything EXCEPT region
  zero (non-existent zones).  Any other number means to plot only
  the specified region number; region=3 would plot region 3 only.
PLOTTING COMMANDS: plm, plc, plv, plf

rspace

DOCUMENT rspace=   plotting keyword
      or rphase=   plotting keyword
      or arroww=   plotting keyword
      or arrowl=   plotting keyword
  selects the spacing, phase, and size of occasional ray arrows
  placed along polylines.  The spacing and phase are in NDC units
  (0.0013 NDC equals 1.0 point); the default rspace is 0.13, and
  the default rphase is 0.11375, but rphase is automatically
  incremented for successive curves on a single plot.
  The arrowhead width, arroww, and arrowhead length, arrowl are
  in relative units, defaulting to 1.0, which translates to an
  arrowhead 10 points long and 4 points in half-width.
PLOTTING COMMANDS: plg

SEE ALSO: type, width, color, marks, marker, rays

triangle

DOCUMENT triangle=   plotting keyword
  sets the triangulation array for a contour plot.  The triangulation
  array must be the same shape as the IREG (region number) array, and
  the correspondence between mesh zones and indices is the same as
  for IREG.  The triangulation array is used to resolve the ambiguity
  in saddle zones, in which the function Z being contoured has two
  diagonally opposite corners high, and the other two corners low.
  The triangulation array element for a zone is 0 if the algorithm is
  to choose a triangulation, based on the curvature of the first
  contour to enter the zone.  If zone (i,j) is to be triangulated
  from point (i-1,j-1) to point (i,j), then TRIANGLE(i,j)=1,
  while if it is to be triangulated from (i-1,j) to (i,j-1), then
  TRIANGLE(i,j)=-1.  Contours will never cross this "triangulation
  line".
  You should rarely need to fiddle with the traingulation array;
  it is a hedge for dealing with pathological cases.
PLOTTING COMMANDS: plc

type

DOCUMENT type=   plotting keyword
  selects line type.  Valid values are the strings "solid", "dash",
  "dot", "dashdot", "dashdotdot", and "none".  The "none" value
  causes the line to be plotted as a polymarker.  You should also
  check the plmk function if you need polymarkers.
  The type value may also be a number; 0 is "none", 1 is "solid",
  2 is "dash", 3 is "dot", 4 is "dashdot", and 5 is "dashdotdot".
PLOTTING COMMANDS: plg, plm, plc, pldj

SEE ALSO: width, color, marks, marker, rays, closed, smooth, plmk

width

DOCUMENT width=   plotting keyword
  selects line width.  Valid values are positive floating point numbers
  giving the line thickness relative to the default line width of one
  half point, width= 1.0.
PLOTTING COMMANDS: plg, plm, plc, pldj, plv (only if hollow=1)

SEE ALSO: type, color, marks, marker, rays, closed, smooth