/usr/share/doc/gri/html/PlottingSeveralColumns.html is in gri-html-doc 2.12.23-9build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Gri: plotting several columns</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"></head>
<body bgcolor="#FFFFFF" text="#000000" link="#0000EE" vlink="#551A8B" alink="FF0000">
<!-- newfile PlottingSeveralColumns.html "Gri: plotting several columns" "Examples" -->
<!-- @node Plotting Several Columns, Commands, Combining Columns, Handling Data -->
<a name="PlottingSeveralColumns" ></a>
<img src="./resources/top_banner.gif" alt="navigation map" usemap="#navigate_top" border="0">
<table summary="top banner" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="150" valign="top">
<font size=-1>
<br>
Chapters:
<br>
<a href="Introduction.html">1: Introduction</a><br>
<a href="SimpleExample.html">2: Simple example</a><br>
<a href="InvokingGri.html">3: Invocation</a><br>
<a href="GettingMoreControl.html">4: Finer Control</a><br>
<a href="X-Y.html">5: X-Y Plots</a><br>
<a href="ContourPlots.html">6: Contour Plots</a><br>
<a href="Images.html">7: Image Plots</a><br>
<a href="Examples.html">8: Examples</a><br>
<a href="Commands.html">9: Gri Commands</a><br>
<a href="Programming.html">10: Programming</a><br>
<a href="Environment.html">11: Environment</a><br>
<a href="Emacs.html">12: Emacs Mode</a><br>
<a href="History.html">13: History</a><br>
<a href="Installation.html">14: Installation</a><br>
<a href="Bugs.html">15: Gri Bugs</a><br>
<a href="TestSuite.html">16: Test Suite</a><br>
<a href="GriInThePress.html">17: Gri in Press</a><br>
<a href="Acknowledgments.html">18: Acknowledgments</a><br>
<a href="License.html">19: License</a><br>
<br>
Indices:<br>
<a href="ConceptIndex.html"><i>Concepts</i></a><br>
<a href="CommandIndex.html"><i>Commands</i></a><br>
<a href="BuiltinIndex.html"><i>Variables</i></a><br>
</font>
<td width="500" valign="top">
<map name="navigate_top">
<area alt="index.html#Top" shape="rect" coords="5,2,218,24" href="index.html#Top">
<area alt="HandlingData.html#HandlingData" shape="rect" coords="516,2,532,24" href="HandlingData.html#HandlingData">
<area alt="Gri: combining columns" shape="rect" coords="557,2,573,24" href="CombiningColumns.html">
<area alt="Gri: complete list of commands" shape="rect" coords="581,2,599,24" href="Commands.html">
</map>
<map name="navigate_bottom">
<area alt="index.html#Top" shape="rect" coords="5,2,218,24" href="index.html#Top">
<area alt="Gri: complete list of commands" shape="rect" coords="581,2,599,24" href="Commands.html">
</map>
<h3>8.12.5: Plotting several y-columns versus on x-column</h3>
Sometimes you'll have a datafile with the first column being x, and the
other columns being various things to plot versus x. For example, you
might have the data
<p>
<TABLE SUMMARY="Example" BORDER="0" BGCOLOR="#efefef" WIDTH="100%">
<TR>
<TD>
<PRE>
<font color="#82140F">
1 8 11 9
2 22 21 20
3 11 10 9
4 20 15 10
</font></PRE>
</TD>
</TR>
</TABLE>
<p>
in a file called `<font color="#82140F"><code>test.dat</code></font>'. Let's say the x-column is time, and
the y-columns are the readings from three temperature sensors. The
following illustrates how you might plot these data. If you think the
new-command which starts this script is useful, just insert it in your
`<font color="#82140F"><samp>~/.grirc</samp></font>' file and you can just use it without re-defining it each
time. This will give Gri a command called `<font color="#82140F"><code>draw curves</code></font>'.
<p>
<TABLE SUMMARY="Example" BORDER="0" BGCOLOR="#efefef" WIDTH="100%">
<TR>
<TD>
<PRE>
<font color="#82140F">
`draw curves \xname \y1name ...'
Draw multiple y columns versus an x column. Assumes
that the datafile is open, and that x is in the first
column, with the y values in one or more following
columns.
<p>
The number of columns is figured out from the options,
as is the name of the x-axis, and the labels to be
used on each of the y curves.
{
# NB. the 3 below lets us skip the words 'draw'
# and 'curves', and the name of the x-column.
.num_of_y_columns. = {rpn wordc 3 -}
if {rpn .num_of_y_columns. 1 >}
show "ERROR: `draw curves' needs at least 1 y column!"
quit
end if
<p>
set x name {rpn 2 wordv}
set y name ""
<p>
# Loop through the columns.
.col. = 0
while {rpn .num_of_y_columns. .col. <}
# The x-values will be in column 1, with y-values
# in columns 2, 3, ..., of the file.
.ycol. = {rpn .col. 2 +}
rewind
read columns x=1 y=.ycol.
# At this point, you may want to change line thickness,
# thickness, color, dash-type, etc. For illustration,
# let's set dash type to the column number.
set dash .col.
draw curve
draw label for last curve {rpn .col. 3 + wordv}
.col. += 1
end while
}
<p>
open test.dat
draw curves time y1 y2 y3
</font></PRE>
</TD>
</TR>
</TABLE>
<p>
</table>
<img src="./resources/bottom_banner.gif" alt="navigation map" usemap="#navigate_bottom" border="0">
</body>
</html>
|