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computers / comp.graphics.apps.gnuplot / plot for [i = 'list of numbers']

SubjectAuthor
* plot for [i = 'list of numbers']Jörg_Buchholz
`* Re: plot for [i = 'list of numbers']Hans-Bernhard_Bröker
 `- Re: plot for [i = 'list of numbers']Jörg_Buchholz

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Subject: plot for [i = 'list of numbers']
From: Jörg_Buchholz
Newsgroups: comp.graphics.apps.gnuplot
Organization: A noiseless patient Spider
Date: Tue, 13 Jul 2021 12:11 UTC
Path: i2pn2.org!i2pn.org!eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: bookwood...@freenet.de (Jörg_Buchholz)
Newsgroups: comp.graphics.apps.gnuplot
Subject: plot for [i = 'list of numbers']
Date: Tue, 13 Jul 2021 14:11:01 +0200
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Hello,

I have a dataset with 10 columns. First I will plot most of them and I use:

plot for [i = 3:10] 'file' skip 6 u 2:i w l t sprintf("T_%i",i-2)

in a second plot I will plot only column 6,8 and 9. Is there a way to
use a list of numeric or only a list of strings.

Plot for [i = 6, 8, 9] 'file' skip 6 u 2:i w l t sprintf("T_%i",i-2)

or

list = "6 8 9"
plot for [i in list] 'file' skip 6 u 2:i w l t sprintf("T_%i",i-2)

Does not work. A solution that works is the following, but it is little
more work.

plot for [i = 6:8:2] 'file' skip 6 u 2:i w l t sprintf("T_%i",i-2),\
for [i = 9:9] '' skip 6 u 2:i w l t sprintf("T_%i",i-2)




Jörg


Subject: Re: plot for [i = 'list of numbers']
From: Hans-Bernhard_Bröke
Newsgroups: comp.graphics.apps.gnuplot
Date: Tue, 13 Jul 2021 12:37 UTC
References: 1
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From: HBBroe...@t-online.de (Hans-Bernhard_Bröker)
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: plot for [i = 'list of numbers']
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Am 13.07.2021 um 14:11 schrieb Jörg Buchholz:

list = "6 8 9"
plot for [i in list] 'file' skip 6 u 2:i w l t sprintf("T_%i",i-2)

Close, but no cigar.  The string-based list does not work like that because its elements evaluated by the for loop are still strings.

The following would have worked, though:


plot for [i in "6 8 9"] 'file' u 2:int(i)

The following may be more useful.  See "help arrays" to understand what it does:

n = 3
array list[n] = [6, 8, 9]
plot for [i in 1:n] 'file' u 2:list[i]




Subject: Re: plot for [i = 'list of numbers']
From: Jörg_Buchholz
Newsgroups: comp.graphics.apps.gnuplot
Organization: A noiseless patient Spider
Date: Wed, 14 Jul 2021 05:07 UTC
References: 1 2
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From: bookwood...@freenet.de (Jörg_Buchholz)
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: plot for [i = 'list of numbers']
Date: Wed, 14 Jul 2021 07:07:07 +0200
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On 13.07.2021 14:37, Hans-Bernhard Bröker wrote:
Am 13.07.2021 um 14:11 schrieb Jörg Buchholz:

list = "6 8 9"
plot for [i in list] 'file' skip 6 u 2:i w l t sprintf("T_%i",i-2)

Close, but no cigar.  The string-based list does not work like that
because its elements evaluated by the for loop are still strings.

The following would have worked, though:


    plot for [i in "6 8 9"] 'file' u 2:int(i)

The following may be more useful.  See "help arrays" to understand what
it does:

    n = 3
    array list[n] = [6, 8, 9]
    plot for [i in 1:n] 'file' u 2:list[i]


Thanks a lot. At the moment I prefer your first solution, cause I
understood it "out of the box".

Jörg


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