similar to: Matrix exponential

> -----Original Message----- > From: Federico Calboli > Sent: Tuesday, January 20, 2004 5:40 PM > To: r-help > Subject: [R] matrix exponential: M^0 > > I would like to ask why the zeroeth power of a matrix gives me a matrix > of ones rather than the identity matrix: > > > D<-rbind(c(0,0,0),c(0,0,0),c(0,0,0)) > > D<-as.matrix(D) > > D >

[ This was posted to the R-packages list (which I moderate), but definitely doesn't belong there. Martin Maechler ] ------- start of forwarded message ------- From: Federico Calboli <f.calboli at ucl.ac.uk> To: r-packages at stat.math.ethz.ch Subject: how to upload Date: 15 Jul 2004 18:30:26 +0100 Dear All, I just finished a add on lib called Malmig, to calculate Malecot

Check out textplot in the gregmisc package ... Federico Calboli <f.calboli@ucl.ac.uk> Sent by: r-help-bounces@stat.math.ethz.ch 07/13/2004 12:06 PM Please respond to f.calboli To: r-help <r-help@stat.math.ethz.ch> cc: Subject: [R] plotting a table together with graphs Dear All, I would like to ask how to add a table to a

Dear All, how do I compute the left eigenvector of a matrix? I gather that "eigen" computes the right eigenvectors... Regards, Federico Calboli -- ================================= Federico C. F. Calboli PLEASE NOTE NEW ADDRESS Dipartimento di Biologia Via Selmi 3 40126 Bologna Italy tel (+39) 051 209 4187 fax (+39) 051 251 208 f.calboli at ucl.ac.uk

Dear All, I would like to ask how to get the Sum of Squares from fitted lme model. I appreciate that lme maximises the likelihood (or REML) and uses likelihood ratio tests, but I just fail why I could not get the SS if I want them. I could use lm to calculate them, but it looks quite pointless to fit a second (and wrong in a way) model for something so trivial. I know that the issue has been

Dear All, I would like to ask how to customize the graph corresponding to a procrustes analysis. I have to distance matrices, that I transform to two set of coordinates by means of muti dimensional scaling: library(mva) c1<-cmdscale(mat.dist1) c2<-cmdscale(mat.dist2) I vant to rotate c2 on c1, and I use the "procrustes" analysis from the {vegan} library. library(vegan)

Dear All, I apologize if the following has been already asked, but I could not find anything in the archives. I am running Debian Sid (on an Athlon XP), with R 1.8.1.cvs.20040307-1 (it describes itself as "R 1.9.0 experimental" when I fire R up) and I am unable to load the library "nlme" (I apt-getted r-recommended, so the library is on the system) >library(nlme) Error in

Dear All, I would like to ask if there is any package that would calculate Malecot migration matrix (or the Imaizumi or Pena implementations of the MMM). I did a site-wide search, and went trough the table of contents of a number of packages that seemed promising, but with no luck. Regards, Federico Calboli -- ================================= Federico C. F. Calboli PLEASE NOTE NEW

Dear All, I am in the somewhat unfortunate position of having to reproduce the results previously obtained from (non-metric?) MDS on a "kinship" matrix using Statistica. A kinship matrix measures affinity between groups, and has its maximum values on the diagonal. Apparently, starting with a nxn kinship matrix, all it was needed to do was to feed it to Statistica flagging that the

Dear all, I would like to ask you the following: I have data about different manuscripts, together with data about the presence/absence of copying errors, in the days when manuscript were really manuscripts. I would ideally like to use the data to draw a phylogenetic tree, so that I can infer which ms was copied from which. The error presence/absence is coded in binary format. The plan is to use

Dear all, I have a function to optimize for a set of parameters and want to set a constraint on only one parameter. Here is my function. What I want to do is estimate the parameters of a bivariate normal distribution where the correlation has to be between -1 and 1. Would you please advise how to revise it? ex=function(s,prob,theta1,theta,xa,xb,xc,xd,t,delta) { expo1=

Hi any, Can some please detail me the createX command in bayesm package? To make things easy for you to help me, let me put forward my problem Suppose I have 3 covariates (say X matrix) and my Y has 3 categories say (1,2,3). Now from the CreateX I understand that the data matrix say 'Xa' must be of dimension n* (naxp), where 'na' is the number of variables and 'p' is

From: Sebastian Andrzej Siewior <sebastian at breakpoint.cc> This is a huge all-in-one patch and deserves a little cleanup and splitting. However, I wanted to get it out here for some feedback. My primar motivation to use SHA1 for checksumming (by default) instead of MD5 is not the additional security bits but performance. On a decent x86 box the SHA1 performance is almost the same as

I use the very nice expm functions available from the expm and Matrix packages. My understanding is that for large sparse matrices the currently best methods available are Krylov subspace methods, but they are as far as I can tell not implemented in either of the packages mentioned, nor in any other R package I have found. Does anybody know if Krylov subspace methods are available from any R

Martyn, No, that didn't work. One other thing in the mix (which I don't think is the issue) is that I call one of the C-entry points of expm. So the DESCRIPTION file imports expm, the NAMESPACE file imports expm, and the init.c file is #include "R.h" #include "R_ext/Rdynload.h" /* Interface to expm package. */ typedef enum {Ward_2, Ward_1, Ward_buggy_octave}

>>>>> Therneau, Terry M , Ph D <therneau at mayo.edu> >>>>> on Thu, 9 Feb 2017 12:56:17 -0600 writes: > Martyn, > No, that didn't work. > One other thing in the mix (which I don't think is the issue) is that I call one of the > C-entry points of expm. So the DESCRIPTION file imports expm, the NAMESPACE file imports

Dear all, I am putting together a business case for R and I would like to know if there exist statistics on the distribution of R in academia, research and commercial institutions. The same information about S-plus would be welcome. Please reply only if you have consistent and certain information. Thank you very much, giovanni

I am using a two-factor ANOVA model with random factor effects including the interaction, i.e. the factors are crossed. I would like to be able to generate all four variance components along with approximate confidence intervals using the NLME package. However, I do not know how to specify the random option because of two problems. First, I do not know how to enter the interaction term into the

Dear all, We compared the gene expression level in two conditions: high (H) and low (L), using real-time PCR. We had 3 samples of each condition, and we quantified each sample twice (i.e. a technical replication). Our data looks like: H1 H1 H2 H2 H3 H3 L1 L1 L2 L2 L3 L3 We want to test if the level in H vs L is significantly different. I would like to use ANOVA and I guess a nested model with

I''m working on a rails app that stores files in a database and allows users do download them again. But when a file starts with newlines they get lost in the process and the browser marks the download as failed because the received filesize is smaller then the expected filesize (the difference is exactly the newlines missing). To reproduce this place something like this an a