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Hi, Can anyone point me to code for the gap statistic? Many thanks and best wishes!

Can anyone please provide me with a simple example on calling R from C? Many thanks and best wishes! GT

Hi, This is not an R question, but can anyone please point me to C/Fortran (C preferred) code which calculates the non-central t-density or the cdf? Many thanks and best wishes! GT

Hi, Can anyone please point to how to decompose BCCB (Block-Circulant-Circulant-Block) matrices? I am interested in the derivations: I do know that this can be numerically done using 2-dimensional FFTs. Many thanks and best wishes!

Hi, I have a grouping of some observations. I want to cluster them using hierarchical clustering and compare how the hierarchical clustering shows up vis-a-vis the groupings. Is it possible to do this in color? I guess what...

Dear all, I have n objects and I want to select k of these with replacement. Do you know of code which would generate all the possible arrangements? Note that this is different from the selection of k of n...

Hi, I am wondering where the library file for R's nmath routines are? Doing a search on libR gave me the following: /usr/lib/libRKC16.so.1.2.0 /usr/lib/libRKC.so.1.2.0 /usr/lib/R...

Hi, I have a one-dimensional N-coordinate periodic Gaussian kernel defined by dnorm(c(0:N/2,(N/2-1):1),sd = h) where h is the bandwidth/smoothing parameter/FWHM. I want to calculate the Fourier transform of...

Hi, Tried to install AnalyzeFMRI on Linux (FC-4) and got the following: > install.packages("AnalyzeFMRI") trying URL 'http://rh-mirror.linux.iastate.edu/CRAN/src/contrib/AnalyzeFMRI_1.1-4.tar.gz' Content type 'application/x-gzip' length 308066...

Hi, Thanks, everyone for all the help! So, here is my calling function in C (called test.c): #include<stdio.h> #include<stdlib.h> #include<Rmath.h> int main(void) { printf("%f \n",pchisq(2.,7., 1, 0)); printf("%f...

Hi, Thanks! --- Jos??? Matos <jaomatos at gmail.com> wrote: > I guess that you intended to send this message to the list. :-) > > On 02/03/06, Globe Trotter <itsme_410 at yahoo.com> wrote: > > Hi, > > > > Thanks, everyone for all the help...

OK, here we go: I am submitting two attachments. The first is the datafile called kinv used to create my circulant matrix, using the following commands: x<-scan("kinv") y<-x[c(109:1,0:108)] X=toeplitz(y) eigen...

--- Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote: > I think we need to make clear that eigen() by default relies on LAPACK > routines and they in turn rely on BLAS routines. We have seen several > instances in which...

--- Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote: > I think we need to make clear that eigen() by default relies on LAPACK > routines and they in turn rely on BLAS routines. We have seen several > instances in which...

Hi, It is my understanding that the eigenvectors of a circulant matrix are given as follows: 1,omega,omega^2,....,omega^{p-1} where the matrix has dimension given by p x p and omega is one of p complex...

Dear all, I have been trying to use R's optimization routines from C and I have some questions. Specifically, I am testing the usage of nmmin which performs Nelder-Mead optimization in order to learn how to do the...

Dear Professor Ripley, These are FC4 RPMs. So, there is a separate RPM called libRmath? I was not aware of that. Btw, it is not in libR.so. Sorry, I did not realize that the installation was important to post...

Hi, Many thanks! I was able to install other packages so I will contact the package maintainer if I can figure out who he is. Any clues? I use this Yahoo! e-mail address as a junk e-mail address...

The example that I submitted earlier in the day. Would you like me to send again? Thanks! --- "Huntsinger, Reid" <reid_huntsinger at merck.com> wrote: > For which X? > > Reid Huntsinger > > -----Original Message----- > From: Globe Trotter [mailto:itsme_410 at yahoo...

Good point: the Bellman reference is a book: Introduction to Matrix Analysis by Bellman (1960). McGraw-Hill Series in Matrix Theory. --- Robin Hankin <r.hankin at noc.soton.ac.uk> wrote: > Hi everyone. > > The following webpage gives a definition of...