similar to: Matrix Size

Dear all, Rank of a matrix depends on which factors? Only on rows or coumns? or both ? If there is a collinearlity in the variables ( columns ) does it effects the rank? > X<-matrix((rnorm(10000)),50) > dim(X) [1] 50 200 > qr(X)$rank [1] 50 > X[,2]<-X[,30] > qr(X)$rank [1] 50 > X[10,]<-X[7,] > qr(X)$rank [1] 49 Thanks Alex [[alternative HTML

hi all i have a function that uses two inputs, say xdata and ydata. An example is the following, simple1<-function(xdata,ydata) { ofit<-lm(ydata~xdata) list(ofit) } say i use arbitray number for xdata and ydata such that D = x1 x2 y 1 1 10 2 6 6 3 10 7 x<-D[,1:2] and y<-D[,3] if one uses these inputs and rund the program we get the following: >simple(xdata=x,ydata=y)

Dear R users I am R newbie creating a function that implements the poker test to test pseudo random bit generators. Iam reading the bits from a text file (1 bit per line), which causes each bit to be stored in an element of a numeric vector. What Iam trying to do is to extract a "block" of bits of arbitray size from the original vector into a smaller numeric vector and then count

been puzzling over this for a day. Summary integer variable to use with histogram, 170,000 rows. Value is day of year. Hist works, lattice histogram with nint does not work (spurious spikes in display), lattice histogram using breaks=c(0:365) works fine. Spike values appear to be sum of two adjacent bins. Want to know if this is a familiar problem, and what the recommended work-around is.

Apologies in advance for a kind of long question: I've written an application called changedfiles (http://www.bangstate.com/software.html#changedfiles), which consists of two parts: a linux kernel module that reports all file operations to a device special, and a userspace daemon which can take arbitray shell action on files matching regexp rules specified in a config file. E.G.,

Hi wizards, I need to know how can I generate this numbers I have n numbers N1,N2 , Nn , but Nn = 1- sum(N1+N2+...+Nn-1) and sum(N1+N2+..Nn)=1 and N1,N2,..Nn with 0<N<1 . Does somebody know how to generate it ? Some distribution or algorithm. Thanks in advance. -- Web Page http://www.geocities.com/ricardo_rios_sv/index.html

Are integers strictly a signed 32 bit number on R even if I am running a 64 bit version of R on a x86_64 bit machine? I ask because I have integers stored in a hdf5 file where some of the data is 64 bit integers. When I read that into R using the hdf5 library it seems any integer greater than 2**31 returns NA. Any solutions? Thanks, Theo [[alternative HTML version deleted]]

Are integers strictly a signed 32 bit number on R even if I am running a 64 bit version of R on a x86_64 bit machine? I ask because I have integers stored in a hdf5 file where some of the data is 64 bit integers. When I read that into R using the hdf5 library it seems any integer greater than 2**31 returns NA. Any solutions? Thanks, Theo [[alternative HTML version deleted]]

Hello everyone, I have come across a bit of an odd problem: I am currently analysing data PCR reaction data of which part is behaving exponential. I would like to fit the exponential part to the following: y0 + alpha * E^t In which Y0 is the groundphase, alpha a fluorescence factor, E the efficiency of the reaction & t is time (in cycles) I can get this to work for most of my reactions,

I have dealt with this on so many platforms in the past that I should know the answer by now. I looked in V&R S Programming, R manuals and FAQ and still can't find the answer. In the Hmisc library I used the R scripts to build the package, which creates Hmisc.so. I have library.dynam('Hmisc', ...) in the .First.lib. When doing library(Hmisc) I get Error in dyn.load ....

greetings! it appeared to me that previous upgrades were strained by sheer amount and size of the update as well as the eagerness of the CentOS userbase to get upgraded... this last one, well... it went so smooth that i believe many may have missed it happening so to speak :-) initially having been a large Galacticom aka Worldgroup BBS operator (remember those?) and then an ISP for going on 2

Hi, I'm trying to make a boxplot with the data at the end of the message, and when I try to execute the command >boxplot(Diatoms) (or for any other field instead of "Diatoms") I get the following error message: Error in oldClass(stats) <- cl : adding class "factor" to an invalid object Any advice would be much appreciated. Thanks a lot, Miriam Date

Hello, does anybody know what's the maximum file size (terabytes?) when using rsync with options --checksum and / or --inplace? What file sizes have been tested in reality? Are there any experiences using rsync (with --checksum and / or --inplace) for big files with several / dozens or terabytes? Thanks a lot, Heinz-Josef Claes

I'm interested in large file system replication capability of rsync. Could some of you people who use it share how large their mirroring is? What would you say is the largest sized site being mirrored using rsync? Thanks! JP

So, if I have a 50,000 flac files with perfect metadata encoded with <=1.1.2, I should... find . -type f -name "*.flac" -exec flac -8 {} \; -print And come back to my computer in about 24-48 hours? I've tested it on a small dir tree and it seemed to be fine. I just wanted to make sure though, before having to re-tag a couple terabytes of data. This is actually a serious

> On Wed, 2020-03-25 at 14:39 +0000, Leroy Tennison wrote: >> Since you state that using -z is almost always a bad idea, could you >> provide the rationale for that? I must be missing something. >> > I think the "rationale" is that at some point the > compression/decompression takes longer than the time reduction from > sending a compressed file. It

Hi, all. I'm intending to install CentOS 7 on a HP Elitebook 8460p. Does anybody have any experience of this? Many thanks for any help. Cheers, Phil...

Hi all, Our company is contemplating moving all our file server services from Novell to a Samba implementation on HPUX, using HP's CIFS/9000 product. CIFS/9000 is essentially Samba with a nice installation package wrapped around it. I have several concerns about this, partially about HP's setup and claims about Samba, and partially about moving everything from 40 Novell to 1 Samba

I have been taking a break for the last month or so, and am only just now catching up on my email. Otherwise, I would have joined this discussion earlier. And... I apologize for the length of this, but I don't think it is overly long. >From the amount of activity in the LispStat news group (none), it seems that LispStat is dead. We all know that Luke is working on R and not on LispStat,

> I'm a denizen of the solr-user at lucene.apache.org mailing list. > [...] > Here's a wiki page that I wrote about that topic. This wiki is going > away next month, but for now you can still access it: > > https://wiki.apache.org/solr/SolrPerformanceProblems That's a great resource, Shawn. I am about to put together a test case to provide a comprehensive FTS