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Groups > comp.graphics.apps.gnuplot > #3524

Re: variable in plot command and key

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On 10.01.2017 17:54, Ethan A Merritt wrote:
> Jörg Buchholz wrote:
> 
>> On 10.01.2017 06:59, Ethan A Merritt wrote:
>>> Karl Ratzsch wrote:
>>>
>>>> Am 09.01.2017 um 17:50 schrieb Jörg Buchholz:
>>>>>
>>>>>
>>>>> Is there a way to use a variable as data file name and have the
>>>>> default key entry?
>>>>>
>>>>
>>>> You mean you want to see the actual file name + the actual "using"
>>>> specifier"? I think not, at least not directly.
>>>>
>>>> You could write the whole plot command into a string and execute it
>>>> with "evaluate"
>>>>
>>>>   fname = "'test_1.dat'"
>>>>   eval "plot ".fname." us 1:2"
>>>
>>> Or slightly simpler:
>>>
>>>    foo = "'test_1.dat'"
>>>    plot @foo using 1:2
>>>
>>> To suppress interpretation of underscores in the plot key
>>>
>>>    set key noenhanced
>>>
>>> I don't think there is currently a way to maintain enhanced text
>>> markup in the key titles while not having it replace underscores in
>>> file names.
>>
>> Thanks for the answers. I give a simplified example to you, and now I
>> see I have oversimplified it. In your suggestions you give the
>> filename as a fix string, but in real it is build from some other
>> variables.
>>
>> At the moment this is my solution:
>>
>> GR='1'          #Group
>> SEM='ws1617'    #Semester
>> MED1='Erbsen'   #Medium 1
>> MED2='Reis'     #Medium 2
>> RPout='../'.SEM.'/G'.GR.'_sieben-test.pdf'      #output file
>> RPdata1='../'.SEM.'/G'.GR.'_'.MED1.'.dat'       #data file 1
>> RPdata1t="'../".SEM.'/G'.GR.'\_'.MED1.".dat'"   #title data file 1
>> RPdata2='../'.SEM.'/G'.GR.'_'.MED2.'.dat'       #data file 2
>> RPdata2t="'../".SEM.'/G'.GR.'\_'.MED2.".dat'"   #title data file 2
>> ...
>> plot RPdata1 u 1:7:(3000) w l lt 1 dt 1 smooth acsplines t 'D[%]',\
>> '' u 1:6:(3000) w l lt 2 dt 2 lc 1 smooth acsplines t 'R[%]',\
>> '' u 1:7 w p pt 4 lc 1 t RPdata1t.' u 1:7',\
>> '' u 1:6 w p pt 6 lc 1 t RPdata1t.' u 1:6'
>>
>> Jörg
> 
> The solution using macros should still work in your more complicated case.
> The only extra requirement is that you wrap the entire constructed
> file name in an additional set of quotation marks.
> Like this:
> 
> quote = '"'
> 
> RPdata2='../'.SEM.'/G'.GR.'_'.MED2.'.dat'       # data file 2
> RPdata2q = quote . RPdata2 . quote              # wrap it in extra quotes
> 
> plot ... @RPdata2q using 1:6, '' using 1:7, ...


On a "singleplot" it works, but "show variables" shows some oddities (gp
5.0 pl 4 WIN and gp 5.0 pl 3 Linux/Fedora 24)

gnuplot> quote = '"'
gnuplot> show variables quote

        Variables beginning with quote:
        quote = "\""

gnuplot> Rpdata1q = quote.Rpdata1.quote
gnuplot> show variables RPdata1q

        Variables beginning with RPdata1q:
        RPdata1q = "\"../ws1617/G0_Erbsen.dat\""

but it still works.

The Problem is, it seams to not work in the multiplot mode. And I use
multiplot. Ok, I don't tell it to you before. I must give more accuracy
to my examples. Sorry.

Jörg

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variable in plot command and key Jörg Buchholz <bookwood4new@freenet.de> - 2017-01-09 17:50 +0100
  Re: variable in plot command and key Karl Ratzsch <mail.kfr@gmx.net> - 2017-01-09 23:50 +0100
    Re: variable in plot command and key Ethan A Merritt <EAMerritt@gmail.com> - 2017-01-09 21:59 -0800
      Re: variable in plot command and key Jörg Buchholz <bookwood4new@freenet.de> - 2017-01-10 08:17 +0100
        Re: variable in plot command and key Ethan A Merritt <EAMerritt@gmail.com> - 2017-01-10 08:54 -0800
          Re: variable in plot command and key Jörg Buchholz <bookwood4new@freenet.de> - 2017-01-11 08:22 +0100

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