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javargas wrote: > How can I generate a random permutation between rows of a matrix M (of m rows > and n columns)? maybe M[ sample(1:m), ] -- Ram?n Casero Ca?as http://www.robots.ox.ac.uk/~rcasero/wiki http...

giacomo moro wrote: > > I would like to count the columns of a data.frame. I know how to > count the rows, but not the columns. Can someone tell me how to do > it? ncol(data.frame) -- Ram?n Casero Ca...

camille wrote: > > I am new on Ubuntu. I would like to use R, but I tried Kate and Scite. > The first one keeps trying to use KDE applications,while the other does > not understand the language. I have searched for...

Carlos Creva Singano (M2004078) wrote: > > 1. How to compute Bootstrap and Jackknife Bias of estimates, like mean? Have you had a look at packages "boot" and "bootstrap"? E.g. you can compute the bias and s.e. of an estimate...

Frank E Harrell Jr wrote: > > This makes me think you are trying to go against maximum likelihood to > optimize an improper criterion. Forcing a single cutpoint to be chosen > seems to be at the heart of your problem. There's...

I'd like to update MASS from version 7.2-11 to version 7-2.19. I am running R 2.0.1 on ubuntu, that installs MASS with the package r-cran-vr. I have tried doing update.packages...

Frank E Harrell Jr wrote: > Eric Rescorla <ekr at rtfm.com> wrote: > >> (2) I'd like to compute goodness-of-fit statistics for my fit >> (Hosmer-Lemeshow, Pearson, etc.). I didn't see a package that >> did this. Have I...

When fitting a logistic regression model using weights I get the following warning > data.model.w <- glm(ABN ~ TR, family=binomial(logit), weights=WEIGHT) Warning message: non-integer #successes in a binomial glm! in: eval(expr, envir, enclos) Details follow...

I am not sure whether I'm doing something wrong or there is a bug in the documentation of ks.test. Following the posting guide, as I'm not sure, I haven't found this in the bug tracker, and...

(Sorry for obvious mistakes, as I am quite a newby with no Statistics background). My question is going to be what is the gain of logistic regression over odds ratios when none of the input variables is continuous. My experiment...

Prof Brian Ripley wrote: > On Sat, 1 Oct 2005, Ram??n Casero Ca??as wrote: > >> I'd like to update MASS from version 7.2-11 to version 7-2.19. I am >> running R 2.0.1 on ubuntu...

Michael Dewey wrote: > At 17:12 09/04/06, Ram??n Casero Ca??as wrote: > > I am not sure what the problem you really want to solve is but it seems > that > a) abnormality is rare > b) the logistic regression...