[R] short way

[Uwe Ligges]

Pesl Thomas wrote:
> 
> i want to replace certain values of a matrix.
> i know how to replace them when the values are in a vector.
> i tried the same way for a matrix and got this answer:
> 
> la[la==0]<-1

This works, if la is a matrix.

> Error in [<-.data.frame(*tmp*, la == 0, value = 1) :
>         matrix subscripts not allowed in replacement

And this shows us: la is a data.frame.

 la <- as.matrix(la)
 la[la==0] <- 1

should do the trick.


> i found a way to do this with "for()",
> but i think this is the worst way to do it.
> 
> So is there a better way?

Regards,
Uwe Ligges
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