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This queue is for tickets about the Chart-Gnuplot CPAN distribution.

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Id: 105238
Status: new
Priority: 0/
Queue: Chart-Gnuplot

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Owner: Nobody in particular
Requestors: Oliver.Koch [...] Linde-LE.com
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Subject: How to plot multiple charts in a multi-page PDF
Date: Mon, 15 Jun 2015 15:40:10 +0200
To: bug-Chart-Gnuplot [...] rt.cpan.org
From: Oliver.Koch [...] Linde-LE.com
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Hi! Here is simple test script to plot two graphs: use diagnostics; use Chart::Gnuplot; my $Data1 = Chart::Gnuplot::DataSet->new( func => 'sin(x)', title => 'sin(x)', style => 'lines', ); my $Data2 = Chart::Gnuplot::DataSet->new( func => 'cos(x)', title => 'cos(x)', style => 'lines', ); my $Chart = Chart::Gnuplot->new( terminal => 'pdfcairo', output => 'Test.pdf', xrange => ["-2*pi", "2*pi"], title => '$Chart', ); $Chart->plot2d($Data1); $Chart->plot2d($Data2); Unfortunately, the generated output is a single sided PDF with the last plot ('cos(x)'). The first chart is overwritten. According to my analysis the reason is that any plot2d() call executes GnuPlot with "terminal", "output" and "plot". When called the second time, the first output is overwritten. Using add2d() for $Data1 did not help. I miss the possibility to specify terminal and output file once in the beginning and then plot any number of charts without closing the output file. This means that execution of GnuPlot must be postponed until all plot calls are collected. I used GnuPlot 5.0 patchlevel 0. Is there any work around available? Many thanks in advance and kind regards, Oliver


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