[R] short way

[Martyn Plummer]

On 29-Aug-00 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
> Error in [<-.data.frame(*tmp*, la == 0, value = 1) : 
>         matrix subscripts not allowed in replacement
> 
> 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?

Try this:

la <- ifelse(la == 0, 1, la)

Martyn
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