[R] basic problem but can't solve it

[Gabor Grothendieck]

Use ave.  Assuming DF is your 2 column data frame:

ave(DF[,1], DF[,2], FUN = mean)

On 5/22/07, Benoit Chemineau <benoitchemineau at gmail.com> wrote:
> Hello,
>   I have a basic problem but i can't figure it out with the
> table underneath. I would like to compute monthly averages.
>   I would like to have the average measure for month #5 for the first
> three rows (the same number in the first three lines) and the average
> measure for month #6 for the last four rows ((the same number in the first
> three lines) in a separate vesctor (let's call it 'result')
>   I tried to use a "while" statement inside a "for" loop but it doesn't
> seem to work.
>   Can someone please help me with this ?
>
>   Measure Month
>   2.28 5
>   14.04 5
>   0.60 5
>   0.21 6
>   0.96 6
>   0.75 6
>   1.28 6
>
>   Thank you !
>
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>
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