If data contain negatives or CR, then I would prefer
filter them first using charsub
".;._2 ('-_',CR,' ') charsub makecsv _2+ 12 4 ?.@$ 5
Вт, 12 ноя 2013, Ric Tikkanz писал(а):
> The problem with a general addon tables/csv is that it has to handle all
> sorts of edge cases, this has a significant overhead and as Bill has
> pointed out, if you can rely on your data being well-formed then using the
> tables/csv is definitely overkill. Bill's suggestion will work great if
> you can rely on the fact that you have a numeric csv with no negatives. If
> that is not the case then the following might work better:
>
> _99 ". ([: ];._2 ,&',');._2 freads datloc,'chunk1.csv'
>
> For example compare the results of
> require 'tables/csv'
> ".;._2 makecsv _2+ 12 4 ?.@$ 5
> to
> _99 ". ([: ];._2 ,&',');._2 makecsv _2+ 12 4 ?.@$ 5
>
>
>
> On Tue, Nov 12, 2013 at 4:12 PM, Scott Locklin <[email protected]>wrote:
>
> > "bill lam-2" wrote:
> >
> > > ".;._2 a
> > > 1 2 3
> > > 4 5 6
> >
> >
> > Oh chrikey, that is a whole lot better (and a lot easier than writing a C
> > gizmo to do this). Thank you for your patience in showing me that one.
> >
> >
> > -SL
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> >
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