Re: [Pgfplots-features] Filter data before plotting

[Florian L. <mai...@xg...>]

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:mai...@xg...]
>> Sent: Tuesday, October 23, 2018 11:10 AM
>> To: pgf...@li...
>> 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
>>
>>
>>
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