

 
PLOT(7) 
FreeBSD Miscellaneous Information Manual 
PLOT(7) 
plot  graphics interface
Files of this format are interpreted by plot(1) to draw graphics on the
screen. A plot file is a UTF stream of instruction
lines. Arguments are delimited by spaces, tabs, or commas. Numbers may be
floating point. Punctuation marks (except , spaces, and tabs at the beginning
of lines are ignored. Comments run from to newline. Extra letters appended to
a valid instruction are ignored. Thus all mean the same thing. Arguments are
interpreted as follows:
 1.
 If an instruction requires no arguments, the rest of the line is
ignored.
 2.
 If it requires a string argument, then all the line after the first field
separator is passed as argument. Quote marks may be used to preserve
leading blanks. Strings may include newlines represented as
 3.
 Between numeric arguments alphabetic characters and punctuation marks are
ignored. Thus line from 5 6 to 7 8 draws a line from (5, 6) to (7,
8).
 4.
 Instructions with numeric arguments remain in effect until a new
instruction is read. Such commands may spill over many lines. Thus the
following sequence will draw a polygon with vertices (4.5, 6.77), (5.8,
5.6), (7.8, 4.55), and (10.0, 3.6).

move 4.5 6.77
vec 5.8, 5.6 7.8
4.55 10.0, 3.6 4.5, 6.77
The instructions are executed in order. The last designated point
in a line, move, rmove, vec, rvec,
arc, or point command becomes the `current point' (X,Y)
for the next command.
 o string
 Open plotting device. For troff, string specifies the size
of the plot (default is
 cl
 Close plotting device.
 e
 Start another frame of output.
 m x y
 (move) Current point becomes x y.
 rm dx dy
 Current point becomes X+dx Y+dy.
 poi x y
 Plot the point x y and make it the current point.
 v x y
 Draw a vector from the current point to x y.
 rv dx dy
 Draw vector from current point to X+dx Y+dy
 li x1 y1 x2 y2
 Draw a line from x1 y1 to x2 y2. Make the current point
x2 y2.
 t string
 Place the string so that its first character is centered on the
current point (default). If string begins with it is centered
(rightadjusted) on the current point. A backslash at the beginning of the
string may be escaped with another backslash.
 a x1 y1 x2 y2 xc yc r
 Draw a circular arc from x1 y1 to x2 y2 with center xc
yc and radius r. If the radius is positive, the arc is drawn
counterclockwise; negative, clockwise. The starting point is exact but the
ending point is approximate.
 ci xc yc r
 Draw a circle centered at xc yc with radius r. If the range
and frame parameters do not specify a square, the `circle' will be
elliptical.
 di xc yc r
 Draw a disc centered at xc yc with radius r using the
filling color (see cfill below).
 bo x1 y1 x2 y2
 Draw a box with lower left corner at x1 y1 and upper right corner
at x2 y2.
 sb x1 y1 x2 y2
 Draw a solid box with lower left corner at x1 y1 and upper right
corner at x2 y2 using the filling color (see cfill
below).
 par x1 y1 x2 y2 xg yg
 Draw a parabola from x1 y1 to x2 y2 `guided' by xg
yg. The parabola passes through the midpoint of the line joining xg
yg with the midpoint of the line joining x1 y1 and x2 y2
and is tangent to the lines from xg yg to the endpoints.
 pol { {x1 y1 ... xn yn} ... {X1 Y1
... Xm Ym} }
 Draw polygons with vertices x1 y1 ... xn yn and X1 Y1 ... Xm
Ym. If only one polygon is specified, the inner brackets are not
needed.
 fi { {x1 y1 ... xn yn} ... {X1 Y1
... Xm Ym} }
 Fill a polygon. The arguments are the same as those for pol except
that the first vertex is automatically repeated to close each polygon. The
polygons do not have to be connected. Enclosed polygons appear as
holes.
 sp { {x1 y1 ... xn yn} ... {X1 Y1
... Xm Ym} }
 Draw a parabolic spline guided by x1 y1 ... xn yn with simple
endpoints.
 fsp { {x1 y1 ... xn yn} ... {X1 Y1
... Xm Ym} }
 Draw a parabolic spline guided by x1 y1 ... xn yn with double first
endpoint.
 lsp { {x1 y1 ... xn yn} ... {X1 Y1
... Xm Ym} }
 Draw a parabolic spline guided by x1 y1 ... xn yn with double last
endpoint.
 dsp { {x1 y1 ... xn yn} ... {X1 Y1
... Xm Ym} }
 Draw a parabolic spline guided by x1 y1 ... xn yn with double
endpoints.
 csp { {x1 y1 ... xn yn} ... {X1 Y1
... Xm Ym} }
 in filename
 (include) Take commands from filename.
 de string { commands }
 Define string as commands.
 ca string scale
 Invoke commands defined as string applying scale to all
coordinates.
 co string
 Use color given by first character of string, one of red,
yellow, green, blue, cyan, magenta,
white, and kblack. If string begins with a digit, it
is taken to be a 32bit number specifying 8 bit each of red, green, blue,
and alpha. For example, 0xFFFF00FF denotes solid yellow.
 pe string
 Use string as the style for drawing lines. The available pen styles
are: solid, dott[ed], short, long,
dotd[ashed], cdash, ddash
 cf string
 Color for filling (see co, above).
 ra x1 y1 x2 y2
 The data will fall between x1 y1 and x2 y2. The plot will be
magnified or reduced to fit the device as closely as possible.
 Range settings that exactly fill the plotting area with unity scaling
appear below for devices supported by the filters of plot(1). The
upper limit is just outside the plotting area. In every case the plotting
area is taken to be square; points outside may be displayable on devices
with nonsquare faces.
 fr px1 py1 px2 py2
 Plot the data in the fraction of the display specified by px1 py1
for lower left corner and px2 py2 for upper right corner. Thus
plots in the lower right quadrant of the display; uses the whole display
but inverts the y coordinates.
 sa
 Save the current environment, and move to a new one. The new environment
inherits the old one. There are 7 levels.
 re
 Restore previous environment.
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