CODEWITHSUNDEEP
plotgnuplot
EverythingRightPlace
EverythingRightPlace

Reputation: 1197

Scaling of multiplot while using variables to define the column

I am getting data from a script stuff.pl and want to plot dynamically into one graph. So I am going to use a loop in Gnuplot (v4.6 patchlevel 3) which leads me to following problem:

Using the file TEST.gp:

xCol=2; yCol=3
set term x11 1
plot '< stuff.pl' u xCol:yCol

xCol=4; yCol=5
set term x11 1
set autoscale y
replot '< stuff.pl' u xCol:yCol

pause 1

and run it via gnuplot TEST.gp my graph isn't scaled proper. The plot is just showing the second graph (scales to its values).

If I use

plot '< stuff.pl' u 2:3
replot '< stuff.pl' u 4:5

, which should behave the same imo, the scaling works.

I am not understanding this behaviour.

Upvotes: 2

Views: 108

Answers (1)

Christoph
Christoph

Reputation: 48420

The replot calls the previous plot command and then adds another plot. In the previous plot command the variables haven't been replaced. When the replot calls the previous plot command, the last values of xCol and yCol are used for both plots!

You can either use two different variables:

xCol1 = 2; yCol1 = 3
plot '< stuff.pl' u xCol1:yCol1

xCol2 = 4; yCol2 = 5
replot '< stuff.pl' u xCol2:yCol2

or you can use macros, which are replaced

set macros
cols='2:3'
plot '< stuff.pl' u @cols

cols='4:5'
replot '< stuff.pl' u @cols

Upvotes: 1

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