I'm trying to create two variables (dka and newsonset) from the
following composite character variable diagnosis:
diagnosis <- c("hypoglycemia","diabetes" ,"newonset&dka", "newonset",
"diabetes", "dka&GI", "diabetes&GI", "newonset", "dka")
I can extract the indices for dka and newonset using the following....
> grep("dka", diagnosis)
[1] 3 6 9
> grep("newonset", diagnosis)
[1] 3 4 8
How do I create
dka = c(0,0,1,0,0,1,0,0,1)
newonset = c(0,0,1,1,0,0,0,1,0)
Thanks. --Dale
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