[R] Subset and order

[Rui Barradas]

Hello,

Maybe like this?

subset(x[order(x$a), ], b == 3)


Hope this helps,

Rui Barradas

Em 05-07-2013 20:33, Noah Silverman escreveu:
> Hello,
>
> I have a data frame with several columns.
>
> I'd like to select some subset *and* order by another field at the same time.
>
> Example:
>
> a	b	c
> 1	2	3
> 3	3	4
> 2	4	5
> 1	3	4
> etc…
>
>
> I want to select all rows where b=3 and then order by a.
>
> To subset is easy:  x[x$b==3,]
> To order is easy: x[order(x$a),]
>
> Is there a way to do both in a single efficient statement?
>
> Thanks,
>
>
>
> --
> Noah Silverman, M.S., C.Phil
> UCLA Department of Statistics
> 8117 Math Sciences Building
> Los Angeles, CA 90095
>
>
>
>
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>
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>
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