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Hi, I have the following problem: I am working on assessing the accuracy of diagnostic tests. I have a log likelihood and 3 unknown parameters. Now I want to apply the EM algorithm to find the maximum likelihood estimates of these parameters. But I don't know anaything about how to code that in R. Can somebody help me?? Greats, Elena -- View this message in context: http://www.nabble.com/EM-algorithm-tp24595358p24595358.html Sent from the R help mailing list archive at Nabble.com.

I've converted the bdsmatrix package (used by coxme) to the newer style of S4, and uploaded it. It is in the pkg directory of survival, on r-forge. I'm stuck on something that is almost certainly a namespace issue. I've borrowed liberally from Matrix (a big help) and read the documentation, and just upgraded to 2.8.1 - but still stuck. All the tests work when I run them "by