[R] comparing a vactor of values in IF statement.

[Gabor Grothendieck]

Try

  V <- ifelse(V > 0.5, 1-V, V)

or 

  V <- pmin(V, 1-V)


On 5/20/05, Jagarlamudi, Choudary <choudary.jagar at swosu.edu> wrote:
> Hi,
> 
>  my vector V<- c(1,0.5,0.06,0.056,0.01,0.04,0.4,0.9,0.82,0.1)
> 
>  if( V > 0.5) { V <- 1 - V }
> 
> I get  a warning saying only the first element will be used in comparing (if V > 0.5).
> However, my results tell me vis-versa ,it actually compares every element of the vector V with 0.5 and that is waht i want it to do.
> Using a for loop is expensive and time consuming since my actual vector is 15000 values.
> 
> Any help to rectify the warning i get is appreciated.
> 
> Thank You.
> 
> Choudary Jagarlamudi
> Instructor
> Southwestern Oklahoma State University
> STF 254
> 100 campus Drive
> Weatherford OK 73096
> Tel 580-774-7136
> 
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