similar to: Problems of data processing

I want to obtain datetime differences in mins in an other column, in front of my datetimes. I have tried this : T1 <- c("12/31/03 23:49","1/1/04 1:14","1/1/04 0:02") T2 <- c("1/1/04 0:58","1/1/04 1:16","") toto <- data.frame(T1,T2) toto y <- strptime(T1,"%m/%d/%y %H:%M") x <- strptime(T2,"%m/%d/%y

I would like to compute the MC test (rfm.test) available in the package MarkedPointProcess (for the data BITOEK for example) in order to test the dependence between the marks and their locations. Why the syntax of rfm.test is false here? I have the message : ****************************** ML WARNING! Forbidden values! -- if there are too many warnings try narrower lower and upper bounds for the

Dear colleague, I'd like to compute linear discriminant analysis, using R. In the book Modern applied statistic with Splus (Venables & Ripley, p. 396), lda function is used. Could you tell me where I can find this function? At what site, can I download this library ? Thank for your help. Best Regards Sovan ---------------------------------------------------------------- Prof. Sovan

Hi everybody, I want to use macro in my R code. But defmacro was not in my libraries. So I installed it : > install.packages("gtools") Installing package(s) into ?C:/Program Files/R/R-2.13.2/library? (as ?lib? is unspecified) essai de l'URL 'http://cran.cict.fr/bin/windows/contrib/2.13/gtools_2.6.2.zip' Content type 'application/zip' length 102500 bytes (100 Kb)

Dear all, I try to figure out how to use R to count the number of pixels of the same color in some gray-level picture. I managed to read it in either tiff or jpeg format, but the returned pixmap object keeps its information out of (my) reach. Is there an easy way to tabulate the different color/graylevel pixels and their numbers? Or should I use a completely different (free) software?

Hi, I just installed version 2.11.1 on my Mac OS X 10.5.2. When I try running R from my xterm, I get the following error: Error in loadNamespace(name) : there is no package called 'lme4' Fatal error: unable to restore saved data in .RData I am returned to the terminal prompt and can not run R. I can open this version of R from the R console and tried installing the lme4 source

Hi everybody, I was wondering if you can help me about a module. In fact, I'm looking for a package or module about Wilks' lambda criterion in R environment. I didn't find it in R website ( http://cran.cict.fr/web/packages/index.html#available-packages-W or http://search.cpan.org/faq.html). If this module exists, could you show me the command line. Thank you very much for your help,

Hi, I need to install "lmtest package".I have tried to several times to install packages however I could not. Can anyone help? Best regards install.packages () --- Please select a CRAN mirror for use in this session --- Warning: unable to access index for repository http://cran.cict.fr/bin/windows/contrib/2.12 Warning: unable to access index for repository

Hi! One of the three French CRAN mirrors, cran.cict.fr (Toulouse) seems to be down most of the time, and at least really not reliable. It has currently been down for 28 days (!) [1], and I know that over two years I've rarely been able to use it (no response, slow, hangs...). I'm sure the maintainers of this mirror mean well, but the result is really negative for French R users. This

Hi there, A new thread was started on the R list about problems to upgrade R to version 2.5.1 and we were re-directed on this list. We are two with exactly the same problem and the same distribution (Ubuntu Feisty 64). We are unable to upgrade to R 2.5.1. The r-base-core package is version 2.4.1 in Ubuntu repositories while all others r-cran related packages are upgraded to R 2.5.1

Hello: I am tried to install the RODBC package in debian etch. At the end of the installation it appears errors: ********************************************** * Installing *source* package 'RODBC' ... checking for gcc... gcc -std=gnu99 checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no

Hello, All: The vignette with the sos package used "upquote.sty", required for R Journal when it was published in 2009. Current CRAN policy disallows "upquote.sty", and I've so far not found a way to pass "R CMD check" with sos without upquote.sty. I changed sos.Rnw per an email exchange with Prof. Ripley without solving the problem; see below. The

I thought that the function eigen(A) will return a matrix with eigenvectors that are independent of each other (thus forming a base and the matrix being invertible). This seems not to be the case in the following example A=matrix(c(1,2,0,1),nrow=2,byrow=T) eigen(A) ->ev solve(ev$vectors) note that I try to get the upper triangular form with eigenvalues on the diagonal and (possibly) 1 just

Hi, I have a question that I have not been succesful in finding a definitive answer to; and I was hoping someone here could give me some pointers to the right place in the literature. A. We have 4 sets of data, A(t), B(t), C(t), and D(t). Each of these consists of a series of counts obtained in sequential time-intervals: so for example, A(t) would be something like: Count A(t): 25,

Hi, I’m sorry, I know that it is a recurrent question but I have not been able to find the response in the Rhelp archives. I think my data require the use of the glmmPQL function but I do not know how to make the model selection. Since the AIC and log-likelihood are apparently meaningless, how can we select the parameters for a model and compare the models to find which one fits best the data?

I am using the rw0901 version of R and I fail in reading large files. Actually, I really dont know how to extend the memory. Does somebody knows? Louis FERRE D?partement de Math?matiques et Informatique Equipe GRIMM |Laboratoire de Stat et Proba Universit? Toulouse Mirail |Universit? Paul Sabatier 5, all?es Antonio Machado |Ade:lferre at cict.fr 31058 Toulouse Cedex

Hi All, When I tried to do logistic regression (with high maximum number of iterations) I got the following warning message Warning message: fitted probabilities numerically 0 or 1 occurred in: (if (is.empty.model(mt)) glm.fit.null else glm.fit)(x = X, y = Y, As I checked from the Archive R-Help mails, it seems that this happens when the dataset exhibits complete separation. However, p-values

dear all, apologizes for bothering with a probably stupid question but I really don' t know how to proceed. I have a dataset which look like df a <- c(1,2,3,4,4,4,5,5) b <- c(11,7,4,9,8,3,12,4) df <-cbind(a,b) I would like to have one which looks like this: a 1 11 2 7 3 4 4 9 8 3 5 12 4 a are vertex of a network, b the edges. In the data the lenght of a is about 50000 I read

> Date: Wed, 01 Mar 2000 18:01:21 +0100 > From: LAREDO Laurent <mim60 at cict.fr> > > I have downloaded and transfered to my P.C (Window 98) > the version of R which has been split on purpose,that is to > say the rw0990b1.zip ,rw0990b2.zip ,etc files. > I encountered no problem as far as the installation is concerned. > But when I try to run some function ,for

Hi, With WXP it's fine but with W98 or NT I don't see services. Here is an extract of the "log.machine" [2003/05/22 10:51:13, 1] smbd/service.c:make_connection(636) pcvideo (141.115.16.24) connect to service rieux as user rieux (uid=902, gid=900) (pid 956) [2003/05/22 10:51:29, 0] smbd/service.c:make_connection(252) pcvideo (141.115.16.24) couldn't find service