V8/usr/man/man5/plot.5
.TH PLOT 5
.SH NAME
plot \- graphics interface
.SH DESCRIPTION
Files of this format are produced by routines
described in
.IR plot (3),
and are interpreted for various devices
by commands described in
.IR plot (1).
A graphics file is an ASCII 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.
Instructions may be the whole function name or just enough characters
to disambiguate it.
(Thus \fB..line\fR, \fBline\fR, or \fBli\fR are all valid instructions.)
Arguments are interpreted as follows:
.TP
1.
If an instruction requires no arguments, the rest of the line is ignored.
.TP
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 `\\n'.
.TP
3.
Between numeric arguments alphabetic characters and
punctuation marks are ignored.
Thus
.ti +5
line from 5 6 to 7 8
.br
draws a line from (5, 6) to (7, 8).
.TP
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).
.IP
.nf
move 4.5 6.77
vec 5.8, 5.6 7.8
4.55 10.0, 3.6 4.5, 6.77
.fi
.PP
The instructions are executed in order.
The last designated point in a
.B "line, move, rmove, vec, rvec, arc"
or
.B point
command becomes the `current point'
(X, Y)
for the next command.
Each of the following descriptions
corresponds to a routine in
.IR plot (3).
.PP
.B "Open & Close"
.TP 10
\fBo\fR[penpl] \fIstring\fR
Open plotting device. For troff
.I string
specifies the size of the plot
(default is 6i.)
.TP 10
\fBcl\fR[osepl]
Close plotting device.
.PP
.B "Basic Plotting Commands"
.TP 10
\fBe\fR[rase]
Start another frame of output
or erase the screen on CRT terminals without scroll.
.TP 10
\fBm\fR[ove] \fIx y\fR
Current point becomes
.I "x y."
.TP 10
\fBrm\fR[ove] \fIdx dy\fR
Current point becomes
.I "X+dx Y+dy."
.TP 10
\fBpoi\fR[nt] \fIx y\fR
Plot the point
.I "x y"
and make it the current point.
.TP 10
\fBv\fR[ec] \fIx y\fR
Draw a line from the current point to
.I "x y."
.TP 10
\fBli\fR[ne] \fIx1 y1 x2 y2\fR
Draw a line from
.I "x1 y1"
to
.I "x2 y2."
Make the current point
.I "x2 y2."
.TP 10
\fBt\fR[ext] \fIstring\fR
Place the following ASCII string so that its
first character is centered on the current point (default).
If
.I string
begins with `\\C', the string is centered on the current point.
If
.I string
begins with `\\R', the string is right adjusted on the current point.
A backslash at the beginning of the string may
be escaped with another backslash (`\\').
.TP 10
\fBa\fR[rc] \fIx1 y1 x2 y2 xc yc r\fR
Draw a circular arc from
.I "x1 y1"
to
.I "x2 y2"
with center
.I "xc yc"
and radius
.I r.
If the radius is positive, the arc is drawn counterclockwise;
if the radius is negetive, the arc is drawn clockwise.
The starting point is exact but the ending point is approximate.
.TP 10
\fBci\fR[rcle] \fIxc yc r\fR
Draw a circle centered at
.I "xc yc"
with radius
.I r.
If the range and frame parameters do not specify a square,
the circle will be elliptical.
.TP 10
\fBdi\fR[sc] \fIxc yc r\fR
Draw a solid circle centered at
.I "xc yc"
with radius
.I r
using the filling color (see \fBcfill\fR below).
\fBdisc\fR only works on the 5620; on other devices
\fBdisc\fR is the same as \fBcircle\fR.
.TP 10
\fBbo\fR[x] \fIx1 y1 x2 y2\fR
Draw a box with lower left hand corner at
.I "x1 y1"
and upper right hand corner at
.I "x2 y2."
.TP 10
\fBsb\fR[ox] \fIx1 y1 x2 y2\fR
Draw a solid box with lower lefthand corner at
.I "x1 y1"
and upper righthand corner at
.I "x2 y2"
using the filling color (see \fBcfill\fR below).
.TP 10
\fBpar\fR[abola] \fIx1 y1 x2 y2 xg yg\fR
Draw a parabola from
.I "x1 y1"
to
.I "x2 y2"
`guided' by
.I "xg yg."
The parabola passes through the midpoint of the line joining
.I "xg yg"
with the midpoint of the line
joining
.I "x1 y1"
and
.I "x2 y2"
and is tangent to the lines from
.I "xg yg"
to the endpoints.
.TP 10
\fBpol\fR[y] \fB{ {\fIx1 y1 ... xn yn\fB}\fR ... \fB{\fRX1 Y1 ... Xm Ym\fB} }\fR
Draw polygons with vertices
.I "x1 y1 ... xn yn"
and
.I "X1 Y1 ... Xm Ym."
If only one polygon is specified, the inner brackets are
not needed.
If square brackets `[ ]' are used, the first
vertex is repeated at the end of the list to close the polygon.
.TP 10
\fBfi\fR[ill] \fB{ {\fIx1 y1 ... xn yn\fB}\fR ... \fB{\fIX1 Y1 ... Xm Ym\fB} }\fR
Fill a polygon.
The arguments are the same as those for \fBpoly\fR above
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.
.TP 10
\fBsp\fR[line] \fB{ {\fIx1 y1 ... xn yn\fB}\fR ... \fB{\fIX1 Y1 ... Xm Ym\fB} }\fR
Draw a parabolic spline guided by
.I "x1 y1 ... xn yn"
with simple endpoints.
.TP 10
\fBfsp\fR[line] \fB{ {\fIx1 y1 ... xn yn\fB}\fR ... \fB{\fIX1 Y1 ... Xm Ym\fB} }\fR
Draw a parabolic spline guided by
.I "x1 y1 ... xn yn"
with double first endpoint.
.TP 10
\fBlsp\fR[line] \fB{ {\fIx1 y1 ... xn yn\fB}\fR ... \fB{\fIX1 Y1 ... Xm Ym\fB} }\fR
Draw a parabolic spline guided by
.I "x1 y1 ... xn yn"
with double last endpoint.
.TP 10
\fBdsp\fR[line] \fB{ {\fIx1 y1 ... xn yn\fB}\fR ... \fB{\fIX1 Y1 ... Xm Ym\fB} }\fR
Draw a parabolic spline guided by
.I "x1 y1 ... xn yn"
with double endpoints.
.TP 10
\fBcsp\fR[line] \fB{ {\fIx1 y1 ... xn yn\fB}\fR ... \fB{\fIX1 Y1 ... Xm Ym\fB} }\fR
Draw a closed parabolic spline guided by
.I "x1 y1 ... xn yn."
.TP 10
\fBin\fR[clude] \fIfilename\fR
Take commands from file
.I filename.
.TP 10
\fBde\fR[fine]\fI string \fB{ \fIcommands \fB}
Define
.I string
as
.I commands.
.TP 10
\fBca\fR[ll]\fI string scale\fR
Invoke commands defined as
.I string
applying
.I scale
to all coordinates.
.PP
.B "Commands Controlling the Environment"
.TP 10
\fBco\fR[lor] \fIstring\fR
Draw lines with color
.I string.
Available colors depend on the device.
.I String
may contain definitions for several devices separated by ``/''.
Colors possible for the various devices are:
.nf
pen \fBblack, red, green, blue, Tblack, Tred, Tgreen, Tblue\fR
(assumes default carousel, T=thick)
\fB1\-8\fR (pen number)
\fB/S\fInumber\fR character size as a % of plotting area
ramtek \fBred, green, blue, magenta, yellow, cyan, white\fR
troff \fB/F\fIstring\fR font
\fB/P\fInumber\fR point size
2621 \fB/H\fIcharacter\fR used for plotting
.fi
.TP 10
\fBpe\fR[n] \fIstring\fR
Use
.I string
as the style for drawing lines.
Not all pen styles are implemented for all devices.
.I String
may contain definitions for several devices separated by ``/''.
The available pen styles are:
.br
.nf
pen \fBsolid, dott\fR[ed], \fBshort, long, dotd\fR[ashed], \fBcdash, ddash\fR
where \fBcdash\fR and \fBddash\fR are combinations of long and short
4014 \fBsolid, dott\fR[ed], \fBshort, long, dotd\fR[ashed], \fBddash\fR
troff \fBsolid, dash\fR where only straight lines will be dashed
5620 \fB/B\fInumber\fR for line thickness
2621 \fB/H\fIcharacter\fR character used for plotting
.fi
.TP 10
\fBcf\fR[ill] \fIstring\fR
Use \fIstring\fR as color for filling.
.I String
may contain the definitions for several devices
separated by `/'.
The following colors are available on the specified devices:
.nf
pen \fBblack, red, green, blue, Tblack, Tred, Tgreen, Tblue
1\-8\fR pen number
ramtek \fBred, green, blue, magenta, yellow, cyan, white\fR
5620 \fB/B\fItexture\fR string with octal numbers for texture; see \fItypes\fR(9.5).
The 16 words of texture should be followed by one word for the mode used
by \fItexture\fR (see \fIbitblt\fR(9.3)
2621 \fB/H\fIcharacter\fR character to use for filling
.LP
All devices
\fB/A\fIdegrees\fR angle of slant of shading lines
\fB/G\fInumber\fR gap between shading lines (in user units)
.fi
.TP 10
\fBra\fR[nge] \fIx1 y1 x2 y2\fR
The data will fall between
.I "x1 y1"
and
.I "x2 y2."
The plot will be magnified or reduced to fit
the device as closely as possible.
.IP
Range settings that exactly fill the plotting area
with unity scaling appear below for
devices supported by the filters of
.IR 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.
.RS
.TP 10n
4014
range(0.,, 0.,, 3120.,, 3120.);
.br
.ns
.TP 10n
troff
range(0.,0.,6144., 6144.);
.br
.ns
.TP 10n
ramtek
range(0., 0., 511., 511.);
.br
.ns
.TP 10n
2621
range(0., 0., 22., 22.);
.br
.ns
.TP 10n
5620
range dependent on layer size
.br
.ns
.TP 10n
pen
range dependent on paper size
.RE
.TP 10
\fBfr\fR[ame] \fIpx1 py1 px2 py2\fR
The data will be plotted in the fraction of the display
specified by
.I "px1 py1"
for lower lefthand corner
and
.I "px2 py2"
for upper righthand corner.
Thus \fBframe .5 0 1. .5\fR plots in the lower right
quadrant of the display;
\fBframe 0. 1. 1. 0.\fR uses the whole display but
inverts the y coordinates.
.TP 10
\fBsa\fR[ve]
Save the current environment, and move to a new one.
The new environment inherits the old one.
There are 7 levels of environment.
.TP 10
\fBre\fR[store]
Restore previous environment.
.SH "SEE ALSO"
plot(1), plot(3), graph(1)