Try

> ifelse( x < 0, x + 1, x)
[1] 0 0 1 2 3 4

See also ?ifelse.

HTH,
Jorge.-


On Wed, Mar 7, 2012 at 2:12 PM, Val <> wrote:

> Hi All,
>
> I have one difficulty in using the conditional if statement
>
> Assume ,
>
> x <- -1:4
>  x
> [1] -1  0  1  2  3  4
>
> if x is lees than want I want to add 1 and I used the following command
>  if(x<0) {x=x+1}
>
> Warning message:
> In if (x < 0) { :
>  the condition has length > 1 and only the first element will be used
> > x
> [1] 0 1 2 3 4 5
>  That command added 1 to each element.
>
> But I want like this  0 0 1 2 3 4
>
> Can anybody help me?
>
> Thanks
> Val
>
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>
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