John -
Is this what you're looking for?
r = sample(c(0,1),10,replace=TRUE)
r
[1] 0 1 0 1 1 0 0 1 0 1
v = 1:10
ifelse(r == 1,v-1,v)
[1] 1 1 3 3 4 6 7 7 9 9
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Fri, 1 Oct 2010, yunjiangster wrote:
Hi,
I am looking for a one-liner code for the following situation
say I have a vector r of 0 and 1's, and another vector v of equal length. I
want to assign v[i]-1 to v[i] if r[i]=1, for all i. How would I do that
using mapply or any other batch processing keywords? thanks.
John
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