similar to: Backslash

Is there a proper function for transforming a character to a number instead of using i=match('c',letters) # 3 Thanks. Josef Eschgf??ller -- Josef Eschgf??ller Dipartimento Matematico Universita' di Ferrara http://felix.unife.it

I have two questions about data frames: (1) How can one extract a simple matrix from a data frame? I tried Matrixfromdf = function (frame,without=1) {a=frame[colnames(frame)[-without]] v=unlist(a,use.names=F) matrix(v,ncol=ncol(a))} but it works well only for without=1, perhaps also because the function in (2) gives probably a different meaning to the first column. (2)

How precise is R numerically? For example I wrote the following function for calculating the volume of the ball inscribed in the unit cube in m dimensions. In order to see what happens in 40 dimensions, I created an output of 24 digits. But how many are precise? Thanks Josef Eschgf?ller Ferrara --------------------------------------- Vol = function (m) {if (m<=1) 1 else Vol(m-2)*pi/(m+m)}

Hi. I need to draw a circle whit center (a,b) and radio r. So I use the R code below a<-1.975 # valore x del centro b<-1.215 # valores y del centro r<-1.46 # radio x1<-seq(a-r,a+r,by=0.01); #los valores de x yp<-sqrt(r^2-(x1-a)^2)+b; # los valores y a partir de la ra??z positiva yn<-(-1)*sqrt(r^2-(x1-a)^2)+b; # los valores y a partir de la ra??z negativa x<-c(x1,x1);

I apologize if this post is not relevant to this mailing list, but I feel it might be of interest for many of you and did not find any other more suitable R-list. We are seeking for a couple of post-docs at University of Ferrara, Italy. The posts are in microarrays data mining and are for people with a degree in Statistics, IT or related. A documented interest in biological problems,

Hi folks, Can anyone enlighten me as to why I get the following when I search for ".csv" at the end of a string? > grep("\.csv$","Blah.csv",value=TRUE) [1] "Blah.csv" Warning messages: 1: '\.' is an unrecognized escape in a character string 2: unrecognized escape removed from "[\.]csv$" R reference for regular expressions says

for the script, please kindly see the script below. At line 10 and line 13, my problems occurs. The first one is I try to retrieve the gene official name from a column of a table. The pattern of official name is something starting with gene_name. For detail problems, please see the according lines. Any suggestions are appreciated example of matching source (extract the Nnat, sometime it would

Hi, I guess the backslash should not be used as the separator for strsplit() in compareVersion(), because the period in [.] is no longer a metacharacter (no need to "escape" it using a backslash): https://github.com/wch/r-source/blob/trunk/src/library/utils/R/packages.R#L866-L867 > compareVersion function (a, b) { .... a <- as.integer(strsplit(a, "[\\.-]")[[1L]])

Hello all, I have a simple question: I have filenames that look like these: "n031ku09.10msmeanc" "n031ku10.10msmeanc" "n031ku11.10msmeanc" [22] "n031ku12.10msmeanc" "n031ti01.10msmeanc" "n031ti02.10msmeanc" I also have a set of the same without the "c" at the end. When I run list.files(".",

Greeting R Community, I am a windows user so this problem may be specific to windows. I often want to source files from within R such as: C:\Users\Rinker\Desktop\Research & Law\Data\School Data 09-10. To source this file I need to go through the path and replace all the backslashes (\) with forward slashes (/). I usually do this in MS Word using the replace option, however, I'd like

I'm a PhD student and I'm working with covariance function. I'm interested to know if exist some packages in R to calculate and plot the bidimensional Autocovariance Function. the input matrix is a matrix that describe a spatial location over a 2-D space and I want to use it in the same way I can use a time serie in the 1-D acf. Thanks, Nicola.

I'm a PhD student and I'm working with covariance function. I'm interested to know if exist some packages in R to calculate and plot the bidimensional Autocovariance Function. the input matrix is a matrix that describe a spatial location over a 2-D space and I want to use it in the same way I can use a time serie in the 1-D acf. Thanks, Nicola.

Commit-ID: afc40b4eb057b08d8cc2eebefdf6cac05849e8ae Gitweb: http://git.kernel.org/?p=libs/klibc/klibc.git;a=commit;h=afc40b4eb057b08d8cc2eebefdf6cac05849e8ae Author: Herbert Xu <herbert at gondor.apana.org.au> AuthorDate: Wed, 28 Mar 2018 18:37:51 +0800 Committer: Ben Hutchings <ben at decadent.org.uk> CommitDate: Fri, 25 Jan 2019 02:57:21 +0000 [klibc] expand: Do not quote

Commit-ID: 6b0cf885180cfb08f7ec5139e67e581bbba5d6be Gitweb: http://git.kernel.org/?p=libs/klibc/klibc.git;a=commit;h=6b0cf885180cfb08f7ec5139e67e581bbba5d6be Author: Herbert Xu <herbert at gondor.apana.org.au> AuthorDate: Wed, 28 Mar 2018 18:37:51 +0800 Committer: Ben Hutchings <ben at decadent.org.uk> CommitDate: Sat, 28 Mar 2020 21:42:55 +0000 [klibc] dash: expand: Do not

I thought that I can use metacharacters such as \w to match word characters with one backslash. But for some reason, I need to include two backslashes. > grepl(pattern='\w', x="what") Error: '\w' is an unrecognized escape in character string starting "\w" > grepl(pattern='\\w', x="what") [1] TRUE I can't find the reason for this

On Tue, Jun 11, 2019 at 10:54 PM Peter Smith <peter.smith at linaro.org> wrote: > On Tue, 11 Jun 2019 at 14:31, Rui Ueyama via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > > > > Hi, > > > > I got a feature request from an internal customer of lld, but I don't > know whether we should implement it or not, so I'd like to get opinions >

Hello Richard, unfortunately upgrading virt-v2v is not an option. Would be nice, but integration with vdsm is not yet ready for that options. On Thu, Jan 25, 2018 at 11:06 AM, Richard W.M. Jones <rjones@redhat.com> wrote: [cut] > I don't know why it slowed down, but I'm pretty sure it's got nothing > to do with the version of oVirt/RHV. Especially in the initial phase

On Fri, Feb 2, 2018 at 12:52 PM, Richard W.M. Jones <rjones@redhat.com> wrote: > There is a section about this in the virt-v2v man page. I'm on > a train at the moment but you should be able to find it. Try to > run many conversions, at least 4 or 8 would be good places to start. Hello Richard, read the man but found nothing explicit about resource usage. Anyway, digging on

On Mon, Feb 5, 2018 at 11:13 PM, Richard W.M. Jones <rjones@redhat.com> wrote: > http://libguestfs.org/virt-v2v.1.html#vmware-vcenter-resources > > You should be able to run multiple conversions in parallel > to improve throughput. > > The only long-term solution is to use a different method such as VMX > over SSH. vCenter is just fundamentally bad. 4 conversions in

On Thu, Jan 25, 2018 at 10:08 AM, Richard W.M. Jones <rjones@redhat.com> wrote: > There's got to be some difference between your staging environment and > your production environment, and I'm pretty sure it has nothing to do > with the version of oVirt. > > Are you running virt-v2v inside a virtual machine, and previously you > ran it on bare-metal? Or did you