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...(f, corr=T) ....... ........ Correlation of Coefficients: (Intercept) z epi z -0.882 epi 0.167 -0.168 Log(scale) 0.000 0.000 0.000 here I want covariance matrix thanks for your help pls reply to me directly if you can mingan yang [[alternative HTML version deleted]]

how do I check the rank of a matrix ? say A= 1 0 0 0 1 0 then rank(A)=2 what is this function? thanks I did try help.search("rank"), but all the returned help information seem irrelevant to what I want. I would like to know how people search for help information like this. rank(base) Sample Ranks SignRank(stats) Distribution of the

Given a vector : pvec=(p1,p2,.... p J) with sum(pvec)=1, all the elements are non-negative, that is, they are probabilities a matrix A ( N* J ), with the elements alpha(ij) are 0 or 1 I want to MAXIMIZE THE RESULT RESULT= product( i=1, to N [ sum ( alpha(ij)* pj , j =1,to J ) ] ) thus, I need to get pvec. how should I do ? for example

I am using the package of Icens but for the function Bisect I do not know what ndir is it just says the direction of pvec, but what kind of values should I use ? thanks for reply pls give me an example.. Bisect(tA, pvec, ndir, Meps, tolbis=1e-07) Arguments: tA: The transpose of the clique matrix. pvec: The current estimate of the probability vector. ndir: