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<head>
<title>plot(7) - Plan 9 from User Space</title>
<meta content="text/html; charset=utf-8" http-equiv=Content-Type>
</head>
<body bgcolor=#ffffff>
<table border=0 cellpadding=0 cellspacing=0 width=100%>
<tr height=10><td>
<tr><td width=20><td>
<tr><td width=20><td><b>PLOT(7)</b><td align=right><b>PLOT(7)</b>
<tr><td width=20><td colspan=2>
<br>
<p><font size=+1><b>NAME </b></font><br>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
plot – graphics interface<br>
</table>
<p><font size=+1><b>DESCRIPTION </b></font><br>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Files of this format are interpreted by <a href="../man1/plot.html"><i>plot</i>(1)</a> to draw graphics
on the screen. A <i>plot</i> file is a UTF stream of instruction lines.
Arguments are delimited by spaces, tabs, or commas. Numbers may
be floating point. Punctuation marks (except <tt><font size=+1>:</font></tt>) , spaces, and
tabs at the beginning of lines are ignored. Comments run from
<tt><font size=+1>:</font></tt> to newline. Extra letters appended to a valid instruction are
ignored. Thus <tt><font size=+1>...line</font></tt>, <tt><font size=+1>line</font></tt>, <tt><font size=+1>li</font></tt> all mean the same thing. Arguments
are interpreted as follows:<br>
1. If an instruction requires no arguments, the rest of the line
is ignored.<br>
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 <tt><font size=+1>\n</font></tt>.<br>
3. Between numeric arguments alphabetic characters and punctuation
marks are ignored. Thus <tt><font size=+1>line from 5 6 to 7 8</font></tt> draws a line from
(5, 6) to (7, 8).<br>
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).<br>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<tt><font size=+1>move 4.5 6.77<br>
vec 5.8, 5.6 7.8<br>
4.55 10.0, 3.6 4.5, 6.77<br>
<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
</font></tt>
</table>
The instructions are executed in order. The last designated point
in a <tt><font size=+1>line</font></tt>, <tt><font size=+1>move</font></tt>, <tt><font size=+1>rmove</font></tt>, <tt><font size=+1>vec</font></tt>, <tt><font size=+1>rvec</font></tt>, <tt><font size=+1>arc</font></tt>, or <tt><font size=+1>point</font></tt> command becomes
the ‘current point’ (<i>X,Y</i>) for the next command.<br>
<p><font size=+1><b>Open & Close </b></font><br>
<tt><font size=+1>o</font></tt> <i>string</i> Open plotting device. For <i>troff</i>, <i>string</i> specifies the
size of the plot (default is <tt><font size=+1>6i</font></tt>).<br>
<tt><font size=+1>cl</font></tt> Close plotting device.<br>
<p><font size=+1><b>Basic Plotting Commands </b></font><br>
<tt><font size=+1>e</font></tt> Start another frame of output.<br>
<tt><font size=+1>m</font></tt> <i>x y</i> (move) Current point becomes <i>x y.<br>
</i><tt><font size=+1>rm</font></tt> <i>dx dy</i>Current point becomes <i>X+dx Y+dy.<br>
</i><tt><font size=+1>poi</font></tt> <i>x y</i>Plot the point <i>x y</i> and make it the current point.<br>
<tt><font size=+1>v</font></tt> <i>x y</i> Draw a vector from the current point to <i>x y.<br>
</i><tt><font size=+1>rv</font></tt> <i>dx dy</i>Draw vector from current point to X<i>+</i>dx Y<i>+</i>dy<br>
<tt><font size=+1>li</font></tt> <i>x1 y1 x2 y2<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a line from <i>x1 y1</i> to <i>x2 y2.</i> Make the current point <i>x2 y2.<br>
</i>
</table>
</table>
<tt><font size=+1>t</font></tt> <i>string</i> Place the <i>string</i> so that its first character is centered
on the current point (default). If <i>string</i> begins with <tt><font size=+1>\C</font></tt> (<tt><font size=+1>\R</font></tt>),
it is centered (right-adjusted) on the current point. A backslash
at the beginning of the string may be escaped with another backslash.<br>
<tt><font size=+1>a</font></tt> <i>x1 y1 x2 y2 xc yc r<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a circular arc from <i>x1 y1</i> to <i>x2 y2</i> with center <i>xc yc</i> and
radius <i>r</i>. If the radius is positive, the arc is drawn counterclockwise;
negative, clockwise. The starting point is exact but the ending
point is approximate.<br>
</table>
</table>
<tt><font size=+1>ci</font></tt> <i>xc yc r<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a circle centered at <i>xc yc</i> with radius <i>r</i>. If the range and
frame parameters do not specify a square, the ‘circle’ will be
elliptical.<br>
</table>
</table>
<tt><font size=+1>di</font></tt> <i>xc yc r<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a disc centered at <i>xc yc</i> with radius <i>r</i> using the filling
color (see <tt><font size=+1>cfill</font></tt> below).<br>
</table>
</table>
<tt><font size=+1>bo</font></tt> <i>x1 y1 x2 y2<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a box with lower left corner at <i>x1 y1</i> and upper right corner
at <i>x2 y2.<br>
</i>
</table>
</table>
<tt><font size=+1>sb</font></tt> <i>x1 y1 x2 y2<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a solid box with lower left corner at <i>x1 y1</i> and upper right
corner at <i>x2 y2</i> using the filling color (see <tt><font size=+1>cfill</font></tt> below).<br>
</table>
</table>
<tt><font size=+1>par</font></tt> <i>x1 y1 x2 y2 xg yg<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a parabola from <i>x1 y1</i> to <i>x2 y2</i> ‘guided’ by <i>xg yg.</i> The parabola
passes through the midpoint of the line joining <i>xg yg</i> with the
midpoint of the line joining <i>x1 y1</i> and <i>x2 y2</i> and is tangent to
the lines from <i>xg yg</i> to the endpoints.<br>
</table>
</table>
<tt><font size=+1>pol { {</font></tt><i>x1 y1 ... xn yn</i><tt><font size=+1>}</font></tt> <i>...</i> <tt><font size=+1>{</font></tt><i>X1 Y1 ... Xm Ym</i><tt><font size=+1>} }<br>
</font></tt>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw polygons with vertices <i>x1 y1 ... xn yn</i> and <i>X1 Y1 ... Xm Ym.</i>
If only one polygon is specified, the inner brackets are not needed.<br>
</table>
</table>
<tt><font size=+1>fi { {</font></tt><i>x1 y1 ... xn yn</i><tt><font size=+1>}</font></tt> <i>...</i> <tt><font size=+1>{</font></tt><i>X1 Y1 ... Xm Ym</i><tt><font size=+1>} }<br>
</font></tt>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Fill a polygon. The arguments are the same as those for <tt><font size=+1>pol</font></tt> 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.<br>
</table>
</table>
<tt><font size=+1>sp { {</font></tt><i>x1 y1 ... xn yn</i><tt><font size=+1>}</font></tt> <i>...</i> <tt><font size=+1>{</font></tt><i>X1 Y1 ... Xm Ym</i><tt><font size=+1>} }<br>
</font></tt>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a parabolic spline guided by <i>x1 y1 ... xn yn</i> with simple
endpoints.<br>
</table>
</table>
<tt><font size=+1>fsp { {</font></tt><i>x1 y1 ... xn yn</i><tt><font size=+1>}</font></tt> <i>...</i> <tt><font size=+1>{</font></tt><i>X1 Y1 ... Xm Ym</i><tt><font size=+1>} }<br>
</font></tt>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a parabolic spline guided by <i>x1 y1 ... xn yn</i> with double
first endpoint.<br>
</table>
</table>
<tt><font size=+1>lsp { {</font></tt><i>x1 y1 ... xn yn</i><tt><font size=+1>}</font></tt> <i>...</i> <tt><font size=+1>{</font></tt><i>X1 Y1 ... Xm Ym</i><tt><font size=+1>} }<br>
</font></tt>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a parabolic spline guided by <i>x1 y1 ... xn yn</i> with double
last endpoint.<br>
</table>
</table>
<tt><font size=+1>dsp { {</font></tt><i>x1 y1 ... xn yn</i><tt><font size=+1>}</font></tt> <i>...</i> <tt><font size=+1>{</font></tt><i>X1 Y1 ... Xm Ym</i><tt><font size=+1>} }<br>
</font></tt>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Draw a parabolic spline guided by <i>x1 y1 ... xn yn</i> with double
endpoints.<br>
</table>
</table>
<tt><font size=+1>csp { {</font></tt><i>x1 y1 ... xn yn</i><tt><font size=+1>}</font></tt> <i>...</i> <tt><font size=+1>{</font></tt><i>X1 Y1 ... Xm Ym</i><tt><font size=+1>} }<br>
in</font></tt> <i>filename<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
(include) Take commands from <i>filename</i>.<br>
</table>
</table>
<tt><font size=+1>de</font></tt> <i>string</i> <tt><font size=+1>{</font></tt> <i>commands</i> <tt><font size=+1>}<br>
</font></tt>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Define <i>string</i> as <i>commands</i>.<br>
</table>
</table>
<tt><font size=+1>ca</font></tt> <i>string scale<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Invoke commands defined as <i>string</i> applying <i>scale</i> to all coordinates.<br>
</table>
</table>
<p><font size=+1><b>Commands Controlling the Environment </b></font><br>
<tt><font size=+1>co</font></tt> <i>string<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Use color given by first character of <i>string</i>, one of <tt><font size=+1>red</font></tt>, <tt><font size=+1>yellow</font></tt>,
<tt><font size=+1>green</font></tt>, <tt><font size=+1>blue</font></tt>, <tt><font size=+1>cyan</font></tt>, <tt><font size=+1>magenta</font></tt>, <tt><font size=+1>white</font></tt>, and <tt><font size=+1>kblack</font></tt>. If <i>string</i> begins
with a digit, it is taken to be a 32-bit number specifying 8 bit
each of red, green, blue, and alpha. For example, <tt><font size=+1>0xFFFF00FF</font></tt> denotes
solid yellow.
</table>
</table>
<tt><font size=+1>pe</font></tt> <i>string<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Use <i>string</i> as the style for drawing lines. The available pen styles
are: <tt><font size=+1>solid</font></tt>, <tt><font size=+1>dott</font></tt>[ed], <tt><font size=+1>short</font></tt>, <tt><font size=+1>long</font></tt>, <tt><font size=+1>dotd</font></tt>[ashed]<tt><font size=+1>, cdash</font></tt>, <tt><font size=+1>ddash<br>
</font></tt>
</table>
</table>
<tt><font size=+1>cf</font></tt> <i>string<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Color for filling (see <tt><font size=+1>co</font></tt>, above).<br>
</table>
</table>
<tt><font size=+1>ra</font></tt> <i>x1 y1 x2 y2<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
The data will fall between <i>x1 y1</i> and <i>x2 y2.</i> The plot will be magnified
or reduced to fit the device as closely as possible.<br>
Range settings that exactly fill the plotting area with unity
scaling appear below for devices supported by the filters of <a href="../man1/plot.html"><i>plot</i>(1)</a>.
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.
</table>
</table>
<tt><font size=+1>fr</font></tt> <i>px1 py1 px2 py2<br>
</i>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
Plot the data in the fraction of the display specified by <i>px1
py1</i> for lower left corner and <i>px2 py2</i> for upper right corner.
Thus <tt><font size=+1>frame .5 0 1. .5</font></tt> plots in the lower right quadrant of the
display; <tt><font size=+1>frame 0. 1. 1. 0.</font></tt> uses the whole display but inverts
the <i>y</i> coordinates.<br>
</table>
</table>
<tt><font size=+1>sa</font></tt> Save the current environment, and move to a new one. The new
environment inherits the old one. There are 7 levels.<br>
<tt><font size=+1>re</font></tt> Restore previous environment.<br>
</table>
<p><font size=+1><b>SEE ALSO </b></font><br>
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
<a href="../man1/plot.html"><i>plot</i>(1)</a>, <a href="../man1/graph.html"><i>graph</i>(1)</a><br>
</table>
<td width=20>
<tr height=20><td>
</table>
<!-- TRAILER -->
<table border=0 cellpadding=0 cellspacing=0 width=100%>
<tr height=15><td width=10><td><td width=10>
<tr><td><td>
<center>
<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a>
</center>
</table>
<!-- TRAILER -->
</body></html>
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