Eric -
What you mean to say is
t <- 3
z <- ifelse(t %in% c(1,2,3),1,0)
z
[1] 1
t <- 4
z <- ifelse(t %in% c(1,2,3),1,0)
[1] 0
Expressions don't recalculate themselves when you change
the value of a variable that they use. For that, you
would need a function:
makez = function(t)ifelse(t %in% c(1,2,3),1,0)
makez(3)
[1] 1
makez(4)
[1] 0
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Wed, 16 Mar 2011, eric wrote:
Why doesn't this work and is there a better way ?
z <-ifelse(t==1 || 2 || 3, 1,0)
t <-3
z
[1] 1
t <-4
z
[1] 1
trying to say ...if t == 1 or if t== 2 or if t ==3 then true, otherwise
false
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