Re: [Gnuplot-info] Use variable from datafile in plot

[Thomas S. <t.s...@fz...>]

without knowing how your data files look like, here's a simple
example:

datafile:

1 1 a
2 2 b
3 3 c
4 4 d

we want to use the "a" in the 1st line as a key title,
so we plot nothing to get the "a", store in "var1", and
then plot the data:

plot "datafile" using 1:(var1=stringcolumn(3), NaN) every ::0::0 notitle, \
"" using 1:2 with lines title var1


ftpronk wrote:
> 
> Dear All,
> 
> I would like to use a variable from a data file as title for a plot. 
> Something like:
> 
> var1 = './data_2' index 1000 using 4
> plot './data_1' index 1000 using 1:2 title var1
> 
> Well, obviously, the example I just gave doesnt work.  But I would like to
> know whether it is possible to do something similar in gnuplot?  Maybe
> using a syntax similar to:
> plot [...]  title sprintf("%d",  myVar)  ?
> 
> Thank you for your help!
> 
> Looking forward to your reply,
> 
> Francois. 
> 

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