[feedgnuplot] 15/18: added --equation
Dima Kogan
dima at secretsauce.net
Fri Nov 13 19:17:27 UTC 2015
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dkogan-guest pushed a commit to branch debian
in repository feedgnuplot.
commit c61e58da0ad88d57697e23836df0c9de4c0db911
Author: Dima Kogan <dima at secretsauce.net>
Date: Fri Nov 13 11:07:18 2015 -0800
added --equation
---
bin/feedgnuplot | 34 +++++++++++++++++++++++++++++++++-
1 file changed, 33 insertions(+), 1 deletion(-)
diff --git a/bin/feedgnuplot b/bin/feedgnuplot
index a731978..a5fcd5d 100755
--- a/bin/feedgnuplot
+++ b/bin/feedgnuplot
@@ -89,6 +89,7 @@ sub interpretCommandline
$options{extracmds} = [];
$options{set} = [];
$options{unset} = [];
+ $options{equation} = [];
$options{curvestyleall} = '';
$options{styleall} = '';
@@ -102,6 +103,7 @@ sub interpretCommandline
'zmin=f', 'zmax=f', 'y2=s@',
'style=s{2}', 'curvestyle=s{2}', 'curvestyleall=s', 'styleall=s', 'with=s', 'extracmds=s@', 'set=s@', 'unset=s@',
'square!', 'square_xy!', 'hardcopy=s', 'maxcurves=i', 'monotonic!', 'timefmt=s',
+ 'equation=s@',
'histogram=s@', 'binwidth=f', 'histstyle=s',
'terminal=s',
'rangesize=s{2}', 'rangesizeall=i', 'extraValuesPerPoint=i',
@@ -818,7 +820,9 @@ sub plotStoredData
my @nonemptyCurves = grep { $_->{datastring} } @curves;
my @extraopts = map {$_->{options}} @nonemptyCurves;
- my $body = join(', ' , map({ "'-' $_" } @extraopts) );
+ my $body = join('', map { "$_," } @{$options{equation}});
+ $body .= join(', ' , map({ "'-' $_" } @extraopts) );
+
if($options{'3d'}) { print PIPE "splot $body\n"; }
else { print PIPE "plot $body\n"; }
@@ -1610,6 +1614,34 @@ times.
=item
+C<--equation xxx>
+
+Gnuplot can plot both data and symbolic equations. C<feedgnuplot> generally
+plots data, but with this option can plot symbolic equations /also/. This is
+generally intended to augment data plots, since for equation-only plots you
+don't need C<feedgnuplot>. C<--equation> can be passed multiple times for
+multiple equations. The given strings are passed to gnuplot directly without any
+thing added or removed, so styling and such should be applied in the string. A
+basic example:
+
+ seq 100 | awk '{print $1/10, $1/100}' |
+ feedgnuplot --with 'lines lw 3' --domain --ymax 1
+ --equation 'sin(x)/x' --equation 'cos(x)/x with lines lw 4'
+
+Here I plot the incoming data (points along a line) with the given style (a line
+with thickness 3), /and/ I plot two damped sinusoids on the same plot. The
+sinusoids are not affected by C<feedgnuplot> styling, so their styles are set
+separately, as in this example. More complicated example:
+
+ seq 360 | perl -nE '$th=$_/360 * 3.14*2; $c=cos($th); $s=sin($th); say "$c $s"' |
+ feedgnuplot --domain --square
+ --set parametric --set "trange [0:2*3.14]" --equation "sin(t),cos(t)"
+
+Here the data I generate is points along the unit circle. I plot these as
+points, and I /also/ plot a true circle as a parametric equation.
+
+=item
+
C<--square>
Plot data with aspect ratio 1. For 3D plots, this controls the aspect ratio for
--
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