similar to: Need help with reduced row echelon form

Hi everyone, I am looking to use R as a MATLAB replacement for linear algebra. I've done a fairly good job for finding replacements for most of the functions I'm interested in, I John Fox wrote a program for implementing the reduced row echelon form of a matrix (by doing the Gauss-Jordan elimination). I modified it a bit: rref <- function(A,

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

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...

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

Sorry for the delay Jeremy. I ran strace on the lowest pid for smbd (I ran "pidof smbd" to get pids, and used the lowest one of the 4 or so that came up). Command was "strace -f -o strace.log `ls /proc/2019/task/ | xargs -n 1 echo -n " -p`". I then copied a 1.3GB file from the server to my client to generate traffic. The resulting file was around 93k lines (15MB).

Hi Jeremy, Is it safe to assume it's just "strace -p <pid>", for the running samba daemon? Regards Kanchana On Wed, Sep 28, 2016, 1:00 PM Jeremy Allison <jra at samba.org> wrote: > On Wed, Sep 28, 2016 at 05:56:24AM +0000, Kanchana Marasinghe via samba > wrote: > > Similar to another thread that was posted recently (archive: > >

Similar to another thread that was posted recently (archive: https://groups.google.com/forum/#!topic/linux.samba/sRvmCb25U_s) I'm trying to get multichannel working with a virtual Linux server running version 4.4.5. Output of 'uname -a': "Linux filehost 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:42:33 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux" I have two VirtIO NICs on my

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

Hi. System is snv_56 sun4u sparc SUNW,Sun-Fire-V440, zil_disable=1 We see many operation on nfs clients to that server really slow (like 90 seconds for unlink()). It''s not a problem with network, there''s also plenty oc CPU available. Storage isn''t saturated either. First strange thing - normally on that server nfsd has about 1500-2500 number of threads. I did

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 tried compiling the latest cvs version of dovecot on my FreeBSD 5.2.1-release box with the ports version of vpopmail: 5.4.3_1. In the configuration file I have two auth paragraphs, one for passwd authentication and one for vpopmail-auth: auth vpopmail { mechanisms = plain userdb = vpopmail passdb = vpopmail user = vpopmail } But the vpopmail dosn'nt work. I got the

The paragraph below is from ZFS admin guide Traditional Volume Management As described in ?ZFS Pooled Storage? on page 18, ZFS eliminates the need for a separate volume manager. ZFS operates on raw devices, so it is possible to create a storage pool comprised of logical volumes, either software or hardware. This configuration is not recommended, as ZFS works best when it uses raw physical

Hi all-- I stumbled on this problem online. I did not like the solution given there which was a long UDF. I thought why cannot split and l/s apply work here. My aim is to split the data frame, use l/sapply, make changes on the split lists and combine the split lists to new data frame with the desired changes/output. The data frame shown below has a column named ID which has 2 variables a and b;

Full_Name: Jarno Tuimala Version: 1.5.0 OS: Windows Nt Submission from: (NULL) (193.166.1.21) Running the following analysis gives as a result kukot vs. kisut. aikaero <- -27.5+5*(0:10) frekvenssi.m <- c(0,1,15,37,53,45,23,18,4,1,1) frekvenssi.n <- c(2,8,12,19,33,47,42,15,2,1,0) win.graph() aikaero <- rep(c(aikaero,aikaero), c(frekvenssi.m,frekvenssi.n)) a.ero <-

Thank you Jeff. Your code works, as usual , perfectly. I am just wondering why if i put the whole code in one line, i get an error message. sdf2 <- lapply( sdf, function(z){z$Value <-ifelse(is.na(z$Value),z$Value[!is.na(z$Value)][1],z$Value)z}) error. unexpected symbol in sdf2 Thanks again EK On Mon, Jan 8, 2018 at 3:12 AM, Jeff Newmiller <jdnewmil at dcn.davis.ca.us> wrote: >

Why do you want to modify df1? Why not just reassemble the parts as a new data frame and use that going forward in your calculations? That is generally the preferred approach in R so you can re-do your calculations easily if you find a mistake later. -- Sent from my phone. Please excuse my brevity. On January 7, 2018 7:35:59 PM PST, Ek Esawi <esawiek at gmail.com> wrote: >I just came

I just came up with a solution right after i posted the question, but i figured there must be a better and shorter one.than my solution sdf1[[1]][1,4]<-lapplyresults[[1]] sdf1[[2]][1,4]<-lapplyresults[[2]] EK On Sun, Jan 7, 2018 at 10:13 PM, Ek Esawi <esawiek at gmail.com> wrote: > Hi all-- > > I stumbled on this problem online. I did not like the solution given > there

OPS, Sorry i did not read the post carfully. Mine will not work if you have zeros on columns A and B.. But you could modify it to work for specific columns i believe. EK On Wed, Nov 22, 2017 at 8:37 AM, Ek Esawi <esawiek at gmail.com> wrote: > Hi *Massimo,* > > *Try this.* > > *a <- mydf==0mydf[a] <- NAHTHEK* > > On Wed, Nov 22, 2017 at 5:34 AM, Massimo Bressan

OPS! Sorry i did indeed posted the code in HTML; should have known better. ifelse(is.na(z$Value),z$Value[!is.na(z$Value)][1],z$Value)z}) error. unexpected symbol in sdf2 On Mon, Jan 8, 2018 at 11:44 AM, Jeff Newmiller <jdnewmil at dcn.davis.ca.us> wrote: > I don't know. You seem to be posting in HTML so your code is mangled. Can you post plain text and use the reprex package to