similar to: row echelon form

I was looking for an R-package that would reduce matrices to row-echelon form, but Google was not my friend; any leads? If not, I wonder if the problem could be expressed in terms of constraint satisfaction...

I think one needs an LU decomposition rather than QR. However, I couldn't find anything off the shelf to do an LU, other than learning that determinant() now uses LU instead of QR or SVD, so the code to do it must be in there for those that want it. You'll probably need to divide rows of U by the first entry if you insist on the unique reduced REF. However, I can't see any reason

Hello I have a 3x3 matrix (A), which I would have to reduce to Reduced Row echelon form.  Besides, at every iteration k, the elementary row matrix Ek has to be printed and also print the product of sum Ei (i=1 to k) and A. Any ideas how to go about doing this. KS. [[alternative HTML version deleted]]

how to produce a Row Reduced Echelon Form for a matrix in R? Aimin Yan

Has anyone coded a rref() in R/S? rref() is MatLab's routine for producing a Row-Reduced Echelon Form of a matrix. -R -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !)

rvaradhan at jhmi.edu wrote: > Full_Name: Ravi Varadhan > Version: 2.8.1 > OS: Windows > Submission from: (NULL) (162.129.251.19) > > > Inverting a matrix with solve(), but using LAPACK=TRUE, gives erroneous > results: Thanks, but there seems to be a much easier fix. Inside coef.qr, we have coef[qr$pivot, ] <- .Call("qr_coef_real", qr, y, PACKAGE =

Refiling this. The actual fix was slightly more complicated. Will soon be committed to R-Patched (aka 2.9.1 beta). -p rvaradhan at jhmi.edu wrote: > Full_Name: Ravi Varadhan > Version: 2.8.1 > OS: Windows > Submission from: (NULL) (162.129.251.19) >=20 >=20 > Inverting a matrix with solve(), but using LAPACK=3DTRUE, gives erroneo= us > results: Thanks, but there seems

Full_Name: Ravi Varadhan Version: 2.8.1 OS: Windows Submission from: (NULL) (162.129.251.19) Inverting a matrix with solve(), but using LAPACK=TRUE, gives erroneous results: Here is an example: hilbert <- function(n) { i <- 1:n; 1 / outer(i - 1, i, "+") } h5 <- hilbert(5) hinv1 <- solve(qr(h5)) hinv2 <- solve(qr(h5, LAPACK=TRUE)) all.equal(hinv1, hinv2) #

Quantitative Risk Analysis with R May 1-4, 2018 Fort Collins, Colorado, USA Join us this spring for our QRA with R training. Our class will focus on applied risk modeling methods using the R statistical language and will cover the core principles of QRA and Monte Carlo simulation modeling. Both Bayesian and frequentist methods will be discussed. This class is very popular with a variety of

Hi, After the option IPFILTER_DEFAULT_BLOCK is specified at kernel conf on FreeBSD 4.8 stable (cvsup'd with tag RELENG_4_8), the machine cannot be ping'd by others on the same network. In addition, the machine cannot ping itself. ping localhost (or 127.0.0.1) -> no route to host ping itself with its own ip address -> no route to host The freebsd box, with an external pppoe

Hi, After the option IPFILTER_DEFAULT_BLOCK is specified at kernel conf on FreeBSD 4.8 stable (cvsup'd with tag RELENG_4_8), the machine cannot be ping'd by others on the same network. In addition, the machine cannot ping itself. ping localhost (or 127.0.0.1) -> no route to host ping itself with its own ip address -> no route to host The freebsd box, with an external pppoe

Sorry for the cross post, but I can't find the original mail I don't know if it was sent to the OpenAFS or the Samba list... I've managed to fix some compilation/build problems when using '--with-afs' to Samba. Something about undefined attributes: ----- s n i p ----- Linking bin/smbd lib/afs.o: In function `afs_createtoken':

Hi, I have a least square fitting problem with linear inequality constraints. pcls seems capable of solving it so I tried it, unfortunately, it is stuck with the following error: > M <- list() > M$y = Dmat[,1] > M$X = Cmat > M$Ain = as.matrix(Amat) > M$bin = rep(0, dim(Amat)[1]) > M$p=qr.solve(as.matrix(Cmat), Dmat[,1]) > M$w = rep(1, length(M$y)) > M$C = matrix(0,0,0)

Hi apologies for what will seem a daft question I'm getting problems with my mail provider who is using dovecot. I've loaded Dovecot on a 8 core ARMHF SBC version 2.2.33.2 on Ubuntu 18.04. The SBC is headless. and the load looks very light and only needs to store/cache 4GB of mail Can I use Dovecot as a buffer between my mail providers Dovecot servers and the several IMAP mail clients

Dear all, I am trying to get an estimate of the intercept for a linear model. In this case, I know the slope of the model, can anyone tell me how to constrain the formula in lm() so that it only estimates the intercept not the slope? Many thanks in advance, Sincerely, Liqing Zhang Dept. of Eco. Evol. Biol. Univ. of CA, Irvine email: lzhang at uci.edu >From VM Mon Apr 30 08:18:45 2001

I don't normally have to go anywhere near this stuff , but it seems to me that this should be a straight-forward process in R. For the purposes of this enquiry I thought I would use something I can work out on my own. So I have my matrix and the right hand results from that matrix tdata <- matrix(c(0,1,0,-1,-1,2,0,0,-5,-6,0,0,3,-5,-6,1,-1,-1,0,0),byrow = T,ncol = 5) sumtd <-

Hello, How about including support for PPP in tinc (echelon)? This not as an alternative protocol, but as a replacement for the tap device. Most unices have fully functional PPP daemons; if tinc were to be able to communicate with them, those could be used instead of tap devices (which are only known to Linux natively). Met vriendelijke groet, Guus Sliepen. --- TINC development list,

On Tue, 25 Apr 2000, Mike MacNeill wrote: > > How do you know that? What are the symptoms? > I was pumping through data to test it and it was putting through about [...] > 18 hours now with no problems. Ah... we'll look into that :) > > Well... first all strange segfaults have stopped (checks for NULL pointers > > everywhere now), and tinc works for networks with

Hello, First: I am not subbed to this list. - So any answers should be CC:ed to me. Thank you. I have a freshly installed debian woody linux box. With 2.4.18 with XFS patch. - I have two drives (76G + 40G) that I have used LVM to get a bigger single volume of. It worked perfectly with scp etc. - But now when I installed samba I get timeouts. [2002/07/06 12:15:32, 0]

Hello, I just want to ask if it has been considered to use OpenSSL for the encryption stuff. I guess they've spent quite some time on the subject and have the cipher routines both debugged and optimized. I know that some of the current cipher code was taken from SSLeay but since OpenSSL is de facto SSLeay successor, it might give tinc more flexibility and allow the user to choose