[R] Functions on matrix row level

[Torsten Hothorn]

> Hi together,
> 
> I have some data in a matrix structure - say 1000 rows with 10 columns. And
> I like to do some calculations (like max, avg or min) on row level. 
> The only solution I found so fare was using a loop like 
> 
> for (i in 1:1000) {
>        max[i]  <- max(matrix[I,])
> }

this will not work anyway (`I' is unknown) and it is unwise to overwrite
`matrix'.

R> apply(mymatrix, 1, max)

will do,

Torsten



> 
> It looks like that this is not very fast.
> Does an other way exists?
> 
> Kind regards
> 
>           Ulrich
> 
> 
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