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acount
2004 Apr 19
0
looking for something like "ave" I can pass non numeric to
...ven vector.
Given data from ss with,,,
subj a rt code
1 1 200 good
1 1 321 good
1 2 457 good
1 2 384 bad
2 1 228 good
2 1 343 bad
....
I would like to do a calculation something like ave returns. An
artificial example that does not work where I have passed the code
field to ave is below.
ss$FAcount<- ave(ss$code, ss$subj, function(x)
length(x[x=="good"])/length(x))