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Dear R experts, I was wondering if there are any R functions that give the tail area of a sum of chisquare distributions of the type: a_1 X_1 + a_2 X_2 where a_1 and a_2...

Dear R-experts, this is not a direct R-problem but I hope you can help me anyway. I would like to minimize || PG-I || over P, where P is a p x p permutation matrix (obtained by permuting the...

Dear R useRs, The new contributed packages 'ICS' and 'ICSNP' are available on CRAN. Descriptions: The 'ICS' package implements the 2 scatter matrix transformation to obtain an invariant coordinate system or independent components, depending on the underlying assumptions. The result...

Dear R useRs, The new contributed packages 'ICS' and 'ICSNP' are available on CRAN. Descriptions: The 'ICS' package implements the 2 scatter matrix transformation to obtain an invariant coordinate system or independent components, depending on the underlying assumptions. The result...

Dear R masters, I have large multivariate time series as zoo objects and want to plot them using lattice. Since I have many variates in one object I would like to have the strips on the left, using strip.left...

Dear R experts, I wrote already a couple of weeks ago but did not get any reply. Therefore I'll rephrase my question and hope some of you can give me some answers or some advice where better to look...

Dear R experts, it would be very kind if you could help me with two wireplot problems. First, when I make a wireplot and transform it into an .eps using the postscript function the eps-file leaves always a lot...

Thanks a lot for all the replies! We managed now to solve our problem by replacing the rand / srand functions by R's random number generator and now the results on windows and linux agree. Thanks again! Klaus Paul Gilbert...

Dear Erwin, Ravi and Hans Werner, thanks a lot for your replies. I don't think I have access to Cplex and therefore probably cannot try that out but will read about MIQP. I played a bit then around with...

Hi, thanks everyone! pchisqsum() in the "survey" package does exactly what I was looking for! Best wishes, Klaus -------- Original-Nachricht -------- Datum: Thu, 29 Mar 2007 07:45:15 -0700 (PDT) Von: Thomas Lumley <tlumley at u.washington.edu> An: S...

Dear R experts, we are preparing an R-package to compute the Oja Median which contains some C++ code in which random numbers are needed. To generate the random numbers we use the following Mersenne-Twister implementation: // MersenneTwister.h // Mersenne...

Dear R experts, I'm planning to write some kind of multivariate regression function where I would like to use a formula method. My question is if there is anywhere some detailed introduction how to program formulas in R? A...

Dear Deepayan, sorry for not being clear - but my problem has nothing to do with the aspect. If I create the eps the following way library(lattice) plot.vol<- wireframe(volcano, aspect = c(1,1.5), scales=list(arrows=F...

Hi! I think the results agree: using simulated data: set.seed(1) library(mvtnorm) x<-rmvnorm(44,rep(0,10)) y = x[(26:45)-1,1:10] x = x[(2:25)-1,1:10] p = ncol(x); p nx = nrow...

Dear R-experts, I have some questions about boxplots with lattice. My data is similar as in the example below, I have two factors (Goodness of Fit and Algorithms) and data values but in each panels the scales are quite...