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2007 Dec 11
2
the observed "log odds" in logistic regression
Dear list: After reading the following two links: http://luna.cas.usf.edu/~mbrannic/files/regression/Logistic.html http://www.tufts.edu/~gdallal/logistic.htm I've known the mathematical basis for logistic regression.However I am still not so sure about the "logit " For a categorical independent variable, It is easy to understand the procedures how "log
2006 Sep 12
2
(no subject)
Hi, I have a problem with aggregate. x <- aggregate(t1,list(t2,t3,t4), mean) z<-x[,3] I want z to be a vector but it is a factor. I've tried to use as.vector(z,mode="numeric") but then the numbers get scrambeled. Any help is appriciated /anders