Hi,
I am running the following code:
ret <- data.frame(V1=rep(NA,dim(hhm)[1]))
years <- c("grade04","grade05","grade06","grade07","grade08")
for(i in 1:(length(years)-1)){
ret[,i] <- ifelse(hhm[,years[i+1]]==hhm[,years[i]],1,0)}
ret$ret.s <- ifelse(ret$V1==1 | ret$V2==1 | ret$V3==1 | ret
$V4==1,c("1"),c("0"))
However, when it encounters an 'NA' in these variables it assigns
ret.s an 'NA'. What I want it to do is either assign a 0 or a 1. A 1
should occur if an individual has the same value for grade04 &
grade05, grade05 & grade06, and so on. If the individual does not have
this I would like to assign a value of 0. However, when it encounters
a NA it assigns an NA. How can I overcome this?
Thanks,
Chris
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