[datatable-help] indexing with nomatch=0

[Eduard Antonyan]

I think I like this proposal - maybe you should write up a few examples of
what current behavior is, vs the proposed behavior.


On Fri, May 3, 2013 at 6:54 PM, Gabor Grothendieck
<ggrothendieck at gmail.com>wrote:

> data.table is supposed to generalize indexing and although not
> explicitly stated the generalization seems to be that indexing is
> merging with the row numbers so there is indeed merging going on and
> that merging should respect nomatch= for consistency.
>
> On Fri, May 3, 2013 at 6:54 PM, Eduard Antonyan
> <eduard.antonyan at gmail.com> wrote:
> > There is no join'ing happening here, thus nomatch=0 has no effect.
> >
> >
> > On Fri, May 3, 2013 at 5:52 PM, Gabor Grothendieck <
> ggrothendieck at gmail.com>
> > wrote:
> >>
> >> The definition of DT was left out by mistake.  It should be:
> >>
> >> DT <- data.table(a=letters[1:3])
> >>
> >>
> >> On Fri, May 3, 2013 at 6:50 PM, Gabor Grothendieck
> >> <ggrothendieck at gmail.com> wrote:
> >> > Consider this example:
> >> >
> >> >> DT[1:4,,nomatch=0]
> >> >     a
> >> > 1:  a
> >> > 2:  b
> >> > 3:  c
> >> > 4: NA
> >> >
> >> > Should it not return only the first 3 rows?  It seems to be ignoring
> >> > the nomatch=0.
> >> >
> >> > --
> >> > Statistics & Software Consulting
> >> > GKX Group, GKX Associates Inc.
> >> > tel: 1-877-GKX-GROUP
> >> > email: ggrothendieck at gmail.com
> >>
> >>
> >>
> >> --
> >> Statistics & Software Consulting
> >> GKX Group, GKX Associates Inc.
> >> tel: 1-877-GKX-GROUP
> >> email: ggrothendieck at gmail.com
> >> _______________________________________________
> >> datatable-help mailing list
> >> datatable-help at lists.r-forge.r-project.org
> >>
> >>
> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
> >
> >
>
>
>
> --
> Statistics & Software Consulting
> GKX Group, GKX Associates Inc.
> tel: 1-877-GKX-GROUP
> email: ggrothendieck at gmail.com
>
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