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Hi Community, I would like to do regularized logistic regression, e.g. lasso, plasso or ridge regression. Can you recommend any packages? Low memory requirement / computational cheapness would be a plus. Markku Karhunen Uni. Helsinki

Hi, Does anybody know, what is going on here? > diag(sqrt(1)) [,1] [1,] 1 > diag(sqrt(0.3333)) <0 x 0 matrix> > sqrt(1) [1] 1 > sqrt(0.3333) [1] 0.5773214 BR, Markku Karhunen researcher University of Helsinki

Hi again, R community. I wonder how you do line breaks in \useage{} section in .Rd files. I am sure there's some tutorial for this somewhere, but I just haven't found it. I have tried \\, \cr, \br and...

Hi, This is a very basic question, but apparently I am too stupid for it. I have a large matrix A, and I need to avoid for loops. How could I apply a function f(a,r,c) on each...

Hi all, I've been wondering for a long time why R drops the dimensions of an array/matrix when you try to take a subset of one column. I mean this: dim(A) [1] 2 5 2 B=A...

Dear all, Has anybody tried numerical solving of ODE's and/or transport equations in R? (Don't ask how we ended up in using R for this job, in the first place!) More precisely, does anybody know any technical...

Ok, apologies. > > On Oct 12, 2012, at 2:52 AM, Markku Karhunen wrote: > >> >> Hi all, >> >> I've been wondering for a long time why R drops the dimensions of >> an array/matrix when you try to take a subset of...

True. Should have read ?diag. However, this provokes a more general question: Is there some way I can declare some scalar and _all its functions_ as matrices? For instance, I would like to A = as.matrix(0.98) B = function...

Thanks, Dr. Maechler. > No, there's no such track. > [ Matlab users coming to R may produce wrong R code > by using 0:n-1 instead of 0:(n-1) ; but I don't assume this > would be the case ] > > Been...

> On 04-Sep-09 10:45:27, Markku Karhunen wrote: >> True. Should have read ?diag. >> >> However, this provokes a more general question: Is there some way I >> can declare some scalar and _all its functions_ as matrices? >> >> For instance, I...

Agreed. What Petr Pikal wrote, works exactly, so thank you all! Best, Markku > It would be helpful if you could be more specific of what exactly > you'd like to compute. Have a look also at the posting guide available...

Thank you all. We must think about implementing these packages. In the meantime, I should clarify my question: Is there any evidence that doing the dumb for loop discretisation is any more dangerous in R, than in any other language...