[R] Summary information by groups programming assitance

[hadley wickham]

On Mon, Dec 22, 2008 at 7:15 PM, Ranney, Steven
<steven.ranney at montana.edu> wrote:
> Thank you all for your help.  I appreciate the assistance. I'm thinking I should have been more specific in my original question.
>
> Unless I'm mistaken, all of the suggestions so far have been for maximum vol and maximum Length by Lake and psd.  I'm trying to extract the max vol by Lake and psd along with the corresponding value of Length.  So, instead of maximum vol and maximum Length, I'd like to find the max vol and the Length associated with that value.

Try which.max along with any of the solutions previously mentioned.

Hadley

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