Re: [R] Plotting the mean of data

From: Uwe Ligges <ligges_at_statistik.uni-dortmund.de>
Date: Tue 03 Jan 2006 - 00:32:08 EST

Kare Edvardsen wrote:

> Hi all!
>
> I've got a datstructure like this:
>
> subject week value
>
> 1 1 4
> 2 1 8
> 3 1 3
> 4 1 5
>
> 1 2 5
> 2 2 6
> 3 2 2
> 4 2 6
>
> 1 3 3
> 2 3 7
> 3 3 3
> 4 3 7
>
> I'd like to plot the mean of 'value' against week. Is there a direct way
> of doing this or do I have to make a new structure with the calculated
> values and then plot it?

For your data.frame X, you want, e.g.:

   A <- aggregate(X, list(X$week), mean)    plot(A$week, A$value)

Uwe Ligges

> All the best!
>



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