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How can I use a function with some additional input parameters in constrOptim? For example, something like fr <- function(x,a) { ## Rosenbrock Banana function x1 <- x[1] x2 <- x[2] a * (x2 - x1 * x1)^2 + (1 - x1)^2 } where the...

ryszard.czerminski at pharma.novartis.com wrote: > I have a data frame (df) with colums x, y and z. > e.g. df <- data.frame(x = sample(4), y = sample(4), z = sample(4)) > I can extract column z by: df...

Hi, I look for a solution to the following problem: I have a (n x p) matrix X and a (p x 1) vector Y which are to be multiplied such the result is the (n x p) matrix Z...

Andy Bernat wrote: > > Dear List, > I just tried installing R 1.1.1 on SuSE 7.0 and encountered some > problems. Using the precompiled binaries, I had a failed dependency: R > was looking for "libblas.so.2" and apparently didn...

"E.A.Catchpole" wrote: > > I would like to do a logistic multiple regression on a binary variate, > with what Genstat calls an offset, ie a regression variable with the > coefficient constrained=1. I'm far from home and have Splus...

Thanks for all solutions! The most elegant & efficient way seems to me t(t(X)*Y) or t(Y*t(X)). Marlene Marlene Mueller wrote: > > Hi, I look for a solution to the following problem: > > I have a (n x...

R is very similar to Gauss for this kind of task. Try: e1 <- x[,23] == 0 e2 <- x[,12] > 1 e3 <- x[,4] < 15 e <- e1 | e2 | e3 # e1 or e2 or e3 x <- x[!e,] # keep if NOT e...

OK, I got the point why the help refers to the arguments of 'optim' only. (Of course, I have read this but did'nt believe it ... ;-)) Thanks to all of you for the clarification and special thanks to Duncan Murdoch...

My guess is that gcc cannot find libz, which most likely means that you do not have installed the development version of it. Search for libz or zlib in yast2. Hope that helps, Marlene Christian Schulz wrote: > Hi, > i try...