It is checking the series of values of X and returning a series of 1
and 0's;
1 if it meets your condition (X>0) and
0 if it doesn't.
What did you expect?
A more complex invocation might look like this:
> ifelse( X > 0, 1:3, -1:-2)
[1] 1 2 3 1 -1 -2
Note the recycling of the elements of the yes and no arguments
Consider also:
> (X>0)+0
[1] 1 1 1 1 0 0
--
David Winsemius
On Feb 10, 2009, at 4:44 PM, kayj wrote:
I have a problem with ifelse(), I do not understand how it works.
X<-c(2,2,1,1,0,0)
str(X)
num [1:6] 2 2 1 1 0 0
Y<-ifelse(X>0,1,0)
Y
[1] 1 1 1 1 0 0
Can some one explain what is going on, I do not understand what
ifelse is
doing in this case. Can someone explain the output Y.
Thanks
--
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