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2007 Aug 24
4
Turning a logical vector into its indices without losing its length
I have the code below which gives me what I want for temp based on
logvec but I was wondering if there was a shorter way ( i.e :
a one liner ) without having to initialize temp to zeros. This is
purely for learning purposes. Thanks.
logvec <- c(TRUE,FALSE,FALSE,TRUE,FALSE,FALSE,TRUE,FALSE)
temp<-numeric(length(invec))
temp[invec]<-which(invec)
temp
[1] 1 0 0 4 0 0 7 0
obviously, the