Subset on ltm_cronbach_alph

[Thomas Friedrichsmeier]

Hi,

Am Thu, 28 Jul 2022 07:06:54 -0500
schrieb DES Alfonso Cano Robles <alfonsociologo at gmail.com>:
> Hi all.
> I just wanted to comment on an issue in the item response theory
> plugin when subsetting a data frame.
> I think it's related to the file:
> 
> /rkward/plugins/analysis/irt/tests/ltm_cronbach_alpha.js
> 
> 
> Specifically with lines:
> 
> // reformat inp_items
> 
> > 17 if (inp_items)
> > 18 inp_items = inp_items.replace(/\n/g,',
> > ').replace(/(\w*)\[\[|\]\]/g, '' );  
> 
> 
>  // The "((/\w*)/g"  argument is not enough to replace the name of a
> data frame like "data.frame" or "my.data.r" which returns a "syntax
> error". Short work around by changing the name of the data frame to
> not using period(s) (".") (or any special characters). I've explored
> a few solutions using regex with no satisfactory success as for
> limiting the result only to the name of the data frame.

Thanks! Fixed. (Although I would not be surprised, if there are more
places where a similar fix is needed).

That code was pretty ancient, no regular expression wrangling is needed:
https://invent.kde.org/education/rkward/commit/c25922ce23c3381fd31878332a5338c889a0634b

Importantly, getList() allows to retrieve list values as an array, and
the modifier ".shortname" extracts the column name, reliably.

Regards
Thomas
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