[R] Using Aggregate() with FUN arguments, which require more than one input variables

[Uwe Ligges]

On 17.01.2012 18:10, RNoob wrote:
> Dear all,
>
> I am trying to apply the aggregate() function to calculate correlations for
> subsets of a dataframe. My argument x is supposed to consist of 2 numerical
> vectors, which represent x and y for the cor() function.
>
> The following error results when calling the aggregate function: Error in
> FUN(X[[1L]], ...) : supply both 'x' and 'y' or a matrix-like 'x'. I think
> the subsets aggregate puts into cor() are sort of list types and therefore
> can't be handled by cor().


as.matrix() will probably help, but since you have not specified your 
reproducible code, we cannot show how to change that.

Uwe Ligges


> Can anyone provide me with a solution?
>
> Regards,
> RNoob
>
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