I would like some help recoding a variable. I have a dataframe 'cause' that translates between a set of codes:
acc nds - - 1 2 3 4 5 8 ... ...
the desired result for dataframe 'p': a - 1 5 5
would be: a b - - 1 2 5 8 5 9
I have tried:
transform(p, b=cause$nds[cause$acc==p$a])
but for some reason it complains about the difference in length between the translation and result dataframes.
This prints the desired result, but I am unsure how to collect the results into a variable.
for (i in p) print cause$nds[cause$acc==i]
Any help greatly appreciated.
Selwyn
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