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2004 Apr 07
4
Problems with rlm
Dear all,
When calling rlm with the following data, I get an error. (R v.1.8.1,
WinXP Pro 2002 with service pack 1.)
> d <- na.omit(data.frame(CPRATIO, HEIGHTZ, FAMILYID))
> c <- tapply(d$CPRATIO, d$FAMILYID, mean)
> h <- tapply(d$HEIGHTZ, d$FAMILYID, mean)
> c
1 2 3 6 7 9 10
11
6.000000 2.500000 3.250000 4.000000 2.333333 2.400000 2.750000
2.000000
12 13...