Gnuplot incremental filename using macro

Question

Hell, I need to plot points out of my c++ application. So I simply save my points to a points.txt and then run system("gnuplot 'plotmakro'"); which contains:

set output 'plot.png'
set terminal png
set grid
set multiplot
plot pointsa.txt' ', 'pointb.txt'

Is there a solution so that I get plot2.png, plot3.png when running the makro again?

Woltan · Accepted Answer · 2012-03-22 09:16:35Z

0

As far as I understand your problem two possible solutions come to my mind:

sed the output of your gnuplot script to another location before running gnuplot with the newly created script or
output the png to some arbitrary file like tmp_plot.png and change the file name after gnuplot is done to your liking.

However, with both suggestions I somehow feel that there is a nicer and cleaner solution to your problem. Maybe you want to think about your interface between your application an gnuplot...

answered Mar 22, 2012 at 9:16

Woltan

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1 Comment

Tobias Over a year ago

Ah, yeah. It's really that simple... Just renaming the file after plotting :-) Thanks!

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