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Groups > comp.graphics.apps.gnuplot > #2083

Re: how to access external variables ?

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Am 2011-01-30 12:45, schrieb gvdmoort:

> But the title of the plot should be dependant of external variables,
> so it can't be specified in the .dem file. It could be for instance
> the time at this moment.

Depending on what you particularly want, you could create an auxiliary 
file "aux.gp" containing statements like

titlestring="yourtitle"

(and also define, of course, numerical variables uses in the plot, 
accordingly) and load it into gnuplot by

load "aux.gp"

You can also  convert numbers into strings via the sprintf function (it 
actually uses a C printf statement to create a string; please see the 
gnuplot help or gnuplot.pdf for more information) and concatenate 
strings with

string3=string1.string2

or

string3="something"."somethingelse".sprintf(...)

etc.

> And it could be interessant to save the plots in files with differents
> names, dependant of such variables.

You can define the output file name (which is set by set output <name>) 
using the strings created like shown above. Maybe there is another 
method I am not aware of, but passing variables via a helper file gives 
you a high degree of freedom.

HTH,

Ingo

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how to access external variables ? gvdmoort <gvdmoort@skynet.be> - 2011-01-30 03:45 -0800
  Re: how to access external variables ? Ingo Thies <ingo.thies@gmx.de> - 2011-01-30 13:08 +0100

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