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From: Michael Okuntsov <okuntsov.mikhail@yandex.ru>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Change sign in column with calculated number
Date: Tue, 22 Nov 2016 18:04:08 +0700
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22.11.2016 17:28, Michael Okuntsov пишет:
> Hello,
> my gnuplot script is generated by another script written in perl. I want
> to change the sign of plotted values in this plot command:
>
> plot [][] for [i=1:11] 'tests.dat' every :::10::10 using 1:i+1 lt i+2 lw
> 6 w linesp
>
> I've tried to change "using 1:i+1" to 1:(-$(i+1)), 1:$(-$(i+1)) etc, but
> it does not work. How can this be done?

Found the answer, using 1:(-column(i+1))