gnuplot not recognizing plot for syntax

Question

I am trying to use the for syntax for multiple columns.

I have a data file colhead.dat:

Id a1 a2 a3
1  1  2  3
2  2  3  4
3  2  3  4

Following the answer https://stackoverflow.com/a/17525615/429850, I do

gnuplot>  plot for [i=2:5] 'colhead.dat' u 1:i w lp title columnheader(i)
                    ^
         ':' expected

How do i write the for loop? Here's the gnuplot version header

Version 4.2 patchlevel 6
last modified Sep 2009
System: Linux 2.6.32-71.el6.x86_64

sweber · Accepted Answer · 2014-12-03 08:23:36Z

3

For-loops have been implemented in version 4.6 of gnuplot, and there was nothing like loops in the versions before. So you have to update your version!

Edit: As Christoph mentioned, first for functionality was introduced in 4.4. However, 4.2 is too old.

edited Dec 3, 2014 at 8:23

answered Nov 16, 2014 at 21:14

sweber

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1 Comment

Christoph Over a year ago

Actually, plot for was introduced in 4.4. Only do for was introduced later with 4.6 ;)

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