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.ig >>
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<title>ploticus: proc line</title>
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<table cellpadding=2 width=550><tr>
<td><br><h2>proc line</h2></td>
<td align=right>
<small>
<a href="../doc/welcome.html"><img src="../doc/ploticus.gif" border=0></a><br>
Version 2.33 Jun'06
</small><br><a href="../doc/scripthome.html">Scripts</a>
<td></tr></table>
</td></tr>
<td>
<br>
<br>
.>>
.TH proc_line PL "02-JUN-2006 PL ploticus.sourceforge.net"
.ig >>
<center>
<img src="../gallery/line0.gif">
</center>
.>>
.LP
\fBproc line\fR may be used to draw arbitrary lines in scaled space or absolute space.
It is typically used for annotations, etc.
To plot a line or curve from data, see
.ig >>
<a href="lineplot.html">
.>>
\0proc lineplot.
.ig >>
</a>
.>>
See also
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<a href="drawcommands.html">
.>>
\0proc drawcommands.
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</a>
.>>
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<br><br><br>
.>>
.SH Attributes
The \fCpoints\fR attribute \fBmust\fR be specified.
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<br><br>
.>>
.LP
\fBpoints\fR
.ig >>
.>>
.ig >>
<a href="attributetypes.html#text">
.>>
\0multiline-text
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</a>
.>>
.IP \0
A list of points. One or more lines. Ends at first empty (blank) line.
Each line may have one coordinate pair or two. If \fBtwo\fR, the
first point is the beginning of a line, and the second point is the end
of a line. If \fBone\fR, the point is taken as a continuation of line
from previous point.
.br
Example 1:
.nf
points: 1.0 3.0 1.0 4.5
3.0 4.5
3.0 3.0
.fi
Example 2:
With \fClocval\fR notation (the default), you can do things like this:
.nf
points: min 0(s) max 0(s)
.fi
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<a href="attributetypes.html#locvalue">
.>>
\0More info on locval notation
.ig >>
</a>
.>>
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<br><br>
.>>
.LP
\fBnotation\fR
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.>>
\fCabsolute | scaled | locval\fR
.IP \0
Specifies whether points are to be taken as locations in absolute
space, scaled space, or
.ig >>
<a href="attributetypes.html#locvalue">
.>>
\0location values.
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</a>
.>>
Default is \fClocval\fR.
.br
Example: \fCnotation: scaled\fR
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<br><br>
.>>
.LP
\fBlinedetails\fR
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.>>
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<a href="linedetails.html">
.>>
\0linedetails
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</a>
.>>
.IP \0
Details controlling the rendering of the line.
.br
Example: \fClinedetails: width=3 color=green\fR
.ig >>
<br><br>
.>>
.LP
\fBanchor\fR
.ig >>
.>>
x y
.IP \0
If specified, the \fCpoints\fR still specifies how the lines are to be drawn, but
lines are drawn relative to \fIx, y\fR.
\fIx\fR and \fIy\fR should be in absolute space.
Does not work for values in scaled space, so \fCnotation\fR should be \fCabsolute\fR
or \fClocval\fR with no \fC(s)\fR values.
This can be used to specify elaborate sets of \fCpoints\fR once, then render the figure
multiple times in different locations. Versions 2.31+
.IP \0
The following example draws a 1" square in two locations:
.nf
#proc line
#saveas D1
anchor: 2 3
points: 0 0 0 1
1 1
1 0
0 0
#proc line
#clone D1
anchor: 4 4
.fi
.ig >>
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.>>
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