tapply(Measure,Month,mean)[as.character(Month)]

-- 
Christophe Pallier (http://www.pallier.org)


On 5/22/07, Benoit Chemineau <benoitchemineau@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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