search for: psisquare

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2004 Oct 11
3
split and rlm
...rying to do a little rlm of some data that looks like this: UNIT COHORT perdo adjodds 1010 96 0.39890 1.06894 1010 97 0.48113 1.57500 1010 98 0.36328 1.21498 1010 99 0.44391 1.38608 It works fine like this: rlm(perdo ~ COHORT, psi=psisquare) But the problem is that I have about 100 UNITs, and I want to do a separate rlm for each one. I tried to use split and lapply but it didn't work at all. Is this possible? In addition, I'm trying to extract the t statistic for the slope coefficient and the degrees of freedom so I can put t...