Hi Florian, I think there was already a discussion about an inclusion of such a feature. I think the conclusion was that it is not a trivial task, because the elements to filter could be of numerical or non-numerical type, and the data could come from a table with and without headers. And many, many more things need to be considered.
Thus I don't have much hope that Christian -- the developer -- will find a
"global" solution to this problem in the near future. But to keep track of
that, consider adding a feature request to the PGFPlots Tracker
<https://sourceforge.net/p/pgfplots/feature-requests/>
if there isn't already one in for that feature.
Best regards,
Stefan
> -----Original Message-----
> From: Florian Lindner [mailto:mailingli...@xgm.de]
> Sent: Wednesday, October 24, 2018 5:34 PM
> To: Stefan Pinnow
> Cc: pgfplots-features@lists.sourceforge.net
> Subject: Re: [Pgfplots-features] Filter data before plotting
>
> Hi Stefan,
>
> thanks for that link, works like a charm. I renamed it to "only if" for
> brevity.
>
> Still, I think that this is a worthy feature for inclusion into pgfplot,
> don't?
>
> Best Thanks,
> Florian
>
> Am 23.10.18 um 17:36 schrieb Stefan Pinnow:
> > Hello Florian,
> >
> > this is already possible with a minor modification of the code.
> > Have a look at
> > <https://tex.stackexchange.com/a/342529/95441>
> > I am pretty sure that this question was also already there for `discard
> if'
> > but after a quick search I couldn't find the answer.
> >
> > But I think you already know what needs to be done to combine/"append"
> > filters ;)
> >
> >
> > Best regards,
> > Stefan
> >
> >
> >> -----Original Message-----
> >> From: Florian Lindner [mailto:mailingli...@xgm.de]
> >> Sent: Tuesday, October 23, 2018 11:10 AM
> >> To: pgfplots-features@lists.sourceforge.net
> >> Subject: [Pgfplots-features] Filter data before plotting
> >>
> >> Hello,
> >>
> >> it seems to be common demand to filter data that is to be plotted.
> >>
> >> As an example, you have a table:
> >>
> >> | h | Model | Testset | Result |
> >> |-----+-------+---------+--------|
> >> | 1 | A | X | 0.1 |
> >> | 0.5 | A | X | 0.2 |
> >> | 0.2 | A | X | 0.3 |
> >> | 1 | B | X | 0.11 |
> >> | 0.5 | B | X | 0.12 |
> >> | 0.2 | B | X | 0.13 |
> >> | 1 | B | Y | 0.1 |
> >> | 0.5 | B | Y | 0.12 |
> >> | 0.2 | B | Y | 0.1 |
> >>
> >> Now you want to plot all results (x = h, y = Result) for Model=B,
> >> Testset=Y.
> >>
> >> There are some code snippets, like:
> >>
> >> https://tex.stackexchange.com/questions/66640/how-can-i-filter-select-
> >> data-float-text-from-a-table-and-plot-it
> >> https://tex.stackexchange.com/questions/98003/filter-rows-from-a-table
> >>
> >> but they only allow to filter for one criteria.
> >>
> >> As far as I see, pgfplots already have a number of
> filtering/restrictions
> >> possiblilities, but they all act on coordinates only.
> >>
> >> Or is there something like \addplot[restrict={Model==B and Testset=Y},
> >> x=h, y=Result] {my_data.csv}; ?
> >>
> >> What would be the official way of doing that?
> >>
> >> Best Thanks,
> >>
> >> Florian Lindner
> >>
> >>
> >>
> >> _______________________________________________
> >> Pgfplots-features mailing list
> >> Pgfplots-features@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/pgfplots-features
> >
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