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29441
2005 Nov 10
7
different functions on different vector subsets
Hi,
I am trying to apply two different functions on on a vector as follow:
a<-c(NA,1,2,3,-3,-4,-6)
if a>0 I would like to raise it by the power of 2: 2^a and if the a<0 I
would like to have the inverse value, i.e., -1/2^a.
so I thought of doing it two steps:
a[a>0]<-2^[a>0]
a[a<0]<-(-1)/2^a[a<0]
I got the following error
Error: NAs are not allowed in subscripted