[R] sub setting data.frame

[Ista Zahn]

I don't understand the question...

On Mon, Feb 28, 2011 at 2:46 PM, Nicolas Gutierrez <nicolasg at uw.edu> wrote:
> Hi All,
>
> I have a data.frame:
>
>>pop
>
>    consumed ind recruits   gonad cell
> 1    516.74   1     0.02    20.21 0.25
> 2   1143.20   1     0.02    20.21 0.50
> 3    250.00   1     0.02    20.21 0.25
> 4    251.98   1     0.02    18.69 0.25
> 5    598.08   1     0.02    18.69 0.25
> 6    437.38   1     0.02    18.69 0.25
> 7    250.00   1     0.02    17.39 0.25
> 8    250.00   1     0.02    17.39 0.25
> 9    250.00   1     0.02    17.39 0.25
> 10   257.07   1     0.02    16.02 0.25
>
> And I need to get the number of rows that sums a particular value (e.g. 2).

OK so you want the numer of rows where what sums to 2?

>
> In my case above it would be 4 (the first 4 rows ==> sum(pop$cell)=2.

Ah, where cell sums to 2. Except that in the first 4 rows cell sums to 1.25...

Confused!

Can you clarify your question?

Best,
Ista

>
> Any ideas?
> THANKS
>
> Nico
>
>
> --
>
> Nicolas L. Gutierrez
>
> School of Aquatic and Fishery Sciences
> 1122 NE Boat St, Seattle, WA 98105
>
> Lab:    +1 206 221 5457
> Home:   +1 206 290 3858
> www.fish.washington.edu
>
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>



-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org