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