search for: equivariant

Displaying 4 results from an estimated 4 matches for "equivariant".

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2011 Feb 03
1
"hubers" function in R MASS library : problem and solution
Hello: I found the "hubers" function in MASS library is NOT working on the following data: > a <-
2004 Feb 17
1
varimax rotation in R
Hi everyone- I have used several methods to calculate principal components rotated using the varimax procedure. This is simple enough. But I would like to calculate the % of variance explained associated with each PC before and after rotation. factanal returns the % of variance explained associated with each PC but I cannot seem to get it to change after rotation. Many thanks for your
2003 Apr 24
1
AW: estimating number of clusters ("Null or more")
Dear Christian, first of all thank you for your answer. I am going to parse through the pages you told me. Meanwhile I'd like to note that probably it is a good idea to put 2-3 lines of R-code demonstrating such a simple needs somnewhere in docs of `cluster' package. E.g. x<-rnorm(500) ... # output means we have rather 1 claster x<-c(rnorm(500), rnorm(500)+5)
2008 Feb 16
4
Weird SEs with effect()
Hi all, Im a little bit confused concerning the effect() command, effects package. I have done several glm models with family=quasipoisson: model <-glm(Y~X+Q+Z,family=quasipoisson) and then used results.effects <-effect("X",model,se=TRUE) to get the "adjusted means". I am aware about the debate concerning adjusted means, but you guys just have to trust me - it