search for: kjetilbrinchmannhalvorsen

Your understanding isn't similar to mine. Mine says robust/resistant methods are for data with heavy tails, not heteroscedasticity. The common ways to approach heteroscedasticity are transformation and weighting. The first is easy and usually quite effective for dose-response data. The second is not much harder. Both can be done in R with nls(). Andy From: Quin Wills > > I am

The following seems to be an bug in prcomp(): > test <- ts( matrix( c(NA, 2:5, NA, 7:10), 5, 2)) > test Time Series: Start = 1 End = 5 Frequency = 1 Series 1 Series 2 1 NA NA 2 2 7 3 3 8 4 4 9 5 5 10 > prcomp(test, scale.=TRUE, na.action=na.omit) Erro en svd(x, nu = 0) : infinite or missing values in 'x'

Hola! I am sending this to the list since emails from me to Simon Wood has bounced earlier. I get: > library(tsDyn) Loading required package: mgcv Erro en `parent.env<-`(`*tmp*`, value = NULL) : use of NULL environment is defunct Error: package 'mgcv' could not be loaded > library(mgcv) Erro en `parent.env<-`(`*tmp*`, value = NULL) : use of NULL environment

...rk Toronto, On., M5S 2C6, CanadaE-mail: m.zarrei@utoronto.ca            gagzarrei@yahoo.com ******************************** --- On Tue, 10/5/10, peter dalgaard <pdalgd@gmail.com> wrote: From: peter dalgaard <pdalgd@gmail.com> [[elided Yahoo spam]] To: "Kjetil Halvorsen" <kjetilbrinchmannhalvorsen@gmail.com> Cc: "Laurent Gatto" <laurent.gatto@gmail.com>, r-help@r-project.org, "Mehdi Date: Tuesday, October 5, 2010, 10:50 AM On Oct 5, 2010, at 16:29 , Kjetil Halvorsen wrote: > see below. > > On Tue, Oct 5, 2010 at 10:25 AM, Laurent Gatto <laurent.gatto@g...

I am experimenting with rSymPy, and it seems to work nice. However, I dislike the need to wrap all sympy expressions within quotes, it leads to ugly calls like library(rSymPy) Var("x,y,z") sympy("(x+y)**2") and so on. Inspired by the function cq from mvbutiles package: library(mvbutils) > cq function (...) { as.character(sapply(as.list(match.call(expand.dots =

Hola! Este mail llegó a r-help hoy, yo lo mandó también a esta lista. Es interesante con competiciones de predicción/clasificación! ¿Alguien que quiere cooperar? Kjetil ---------- Forwarded message ---------- From: Kjetil Halvorsen <kjetilbrinchmannhalvorsen@gmail.com> Date: Fri, Jan 29, 2010 at 12:19 Subject: Fwd: [R] Classification of supernovae - a challenge To: Kjetil Halvorsen <kjetil1001@gmail.com> ---------- Forwarded message ---------- From: Jarle Brinchmann <jbrinchmann@gmail.com> Date: Fri, Jan 29, 2010 at 7:35 AM Subject: [R...

Hola! I am working on a problem where data points are (square) matrices. Is there a way to make a "vector" of matrices, such that it can be stored in a data.frame? Can that be done with S3? or do I have to learn S4 objects & methods? Kjetil

...un nuevo lenguaje, julia, mire http://julialang.org/ que puede ser usado para an'alisis estad'isticos. Douglas Bates (famosos por nlme, lme4) ha dicho que eventualmente puede reemplazar a R!, mire: www.stat.wisc.edu/~bates/JuliaForRProgrammers.pdf Interesados pueden mirar aqui! http://kjetilbrinchmannhalvorsen.blogspot.no/ saludos, Kjetil

Hello, I would like to know if there is an R-package available for computing the density, distribution function, quantiles and random numbers of the p-generalized normal distribution or if somebody is already working on it. Best regards, Steve Kalke

Hola! I just changed my laptop to debian squeeze, downloaded R devel from svn repo, as described in the manual. Then I configured for building in a separate build dir with: kjetil at kjetil:~/R/Rbuilddir$ sudo ../svn/configure --- which succeeded, with: R is now configured for x86_64-unknown-linux-gnu Source directory: ../svn Installation directory: /usr/local C

Dear all, I admit this is not anything to do R and even with Statistics perhaps. Strictly speaking this is a math related question. However I have some reasonable feeling that experts here would come up with some elegant suggestion to my question. Here my question is: What is sum of all Integers? I somewhere heard that it is Zero as positive and negative integers will just cancel each other out.

Dear all, I have a dataset where I reduced the dimensionality, and now I have a response variable with probabilities/proportions between 0 and 1. I wanted to do a logistic regression on those, but the function glm refuses to do that with non-integer values in the response. I also tried lrm, but that one interpretes the probabilities as different levels and gives for every level a different

After using options(error=recover), it takes a long time (too long) to get back to the prompt. Look at: Browse[1]> recover() Enter a frame number, or 0 to exit 1: window(test, start = c(15, 1), end = c(17, 1), extend = TRUE) 2: window.ts(test, start = c(15, 1), end = c(17, 1), extend = TRUE) 3: as.ts(window.default(x, ...)) 4: window.default(x, ...) 5: function () 6: eval(quote(browser()),

En innebygd og tegnsett-uspesifisert tekst ble skilt ut... Navn: ikke tilgjengelig Nettadresse: https://stat.ethz.ch/pipermail/r-help/attachments/20060921/b479a8df/attachment.ksh

I'm trying to (re)learn Sweave and run into some problems. I use now ubuntu (8.10), emacs + ess. Slowly getting upto speed on ess. I have a complete (hopefully) .Rnw file, but the resulting .tex will not compile. The file does not contain anything exotic, but it produces pdf figures, and that is where the problems come: library(tools) > Sweave("varioCoo.Rnw") Writing to file

When I do t.test on two distributions (see example below), it outputs numerous data about the t.test. What I'd like to do is individually capture some of this data and assign it to other variables. However, I am unable to find anything in the help section. In the example below, the t value is -4.0441 and the p-value is 0.006771 How can I assign these values to two variables, let's

I think the subject says it all. I want to make a simple lattice plot, using xyplot with the argument type=c("l","a"). The problem then is that in the resulting plot it is difficult/impossible to see which plot corresponds to the average and which to the individual profiles. I triedthings like extra arguments lwd=c(1,3) or col=c("blue","red") hoping

...you could please help with what argument I should use to show the [[elided Yahoo spam]] Kind regards, Stella -- Stella Pachidi Master in Business Informatics student Utrecht University ------------------------------ Message: 25 Date: Mon, 22 Nov 2010 12:03:54 -0300 From: Kjetil Halvorsen <kjetilbrinchmannhalvorsen at gmail.com> To: Uwe Ligges <ligges at statistik.tu-dortmund.de> Cc: r-devel <r-help at r-project.org> Subject: Re: [R] ?summaryRprof running at 100% cpu for one hour ... Message-ID: <AANLkTim7qsgaidiEV65pbJfPLOhrHG4yy8jf6Eha==t9 at mail.gmail.com> Content-Type: text/plain; c...

Readers of this list might be interested in the following commenta about R. In a recent report, by Michael N. Mitchell http://www.ats.ucla.edu/stat/technicalreports/ says about R: "Perhaps the most notable exception to this discussion is R, a language for statistical computing and graphics. R is free to download under the terms of the GNU General Public License (see http://www.r-project.

...2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907 ------------------------------ Message: 41 Date: Tue, 07 Mar 2006 18:06:51 -0400 From: Kjetil Brinchmann Halvorsen <kjetilbrinchmannhalvorsen at gmail.com> Subject: Re: [R] reading in only one column from text file To: mark salsburg <mark.salsburg at gmail.com> Cc: R-help at stat.math.ethz.ch Message-ID: <440E03FB.2090906 at gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed mark salsburg wrote: > H...