Re: [R] regular expression

On Thu, Mar 31, 2011 at 5:49 PM, array chip wrote: > Thanks Bernd! I tried your approach with my real example, sometimes it worked, > sometimes it didn't. For example > > grep('[^(arg)]\\.symptom',"stomach.symptom",value=T) > [1] "stomach.symptom" > > grep('[^(arg)]\\.symptom',"liver.symptom",valu

Re: [R] regular expression

Ok then this code didn't do what I wanted. I want "not including 'arg' before '.symptom'", not individual letters of "arg", but rather as a word. Bill Dunlap suggested using invert=T, it works for single 1 condition, but not for 2 conditions here: not including "arg" before ".", but at the same

Re: [R] regular expression

Am 31.03.2011 21:06, schrieb array chip: Ok then this code didn't do what I wanted. I want "not including 'arg' before '.symptom'", not individual letters of "arg", but rather as a word. Bill Dunlap suggested using invert=T, it works for single 1 condition, but not for 2 conditions here: not inc

Re: [R] Linear Model with curve fitting parameter?

> -Original Message- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of stephen sefick > Sent: March-31-11 3:38 PM > To: R help > Subject: [R] Linear Model with curve fitting parameter? > > I have a model Q=K*A*(R^r)*(S^s) > > A, R, and S are data

Re: [R] Uniform inquiry

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[R] Cox Proportional Hazards model with a time-varying covariate

Hello Everyone,   I'm learning how to perform various statistical analyses in R. I'm checking my understanding by replicating examples from my SAS books. Below is an attempt to replicate a Cox Proportional Hazards model with a time-varying covariate. I think I'm doing this correctly but am not c

Re: [R] Effects - plot the marginal effect

Dear Tomas, Write the model as mreg01 = lm(enep1 ~ enpres * proximity1), data=a90) That is, it's not necessary to index a90 as a list since it's given as the data argument to lm, and doing so confuses the effect() function. Also, enpres*proximity1 will include both the enpres:proximity1 in

Re: [R] lattice: wireframe "eats up" points; how to make points on wireframe visible?

okay, I found a solution: library(lattice) f <- function(x) 1/((1-x[1])*(1-x[2])+1) u <- seq(0, 1, length.out=20) grid <- expand.grid(x=u, y=u) x <- grid[,1] y <- grid[,2] z <- apply(grid, 1, f) pt.x <- c(0.4, 0.7) pt.y <- c(0.6, 0.8) eps <- 0.4 pts <- rbind(c(pt.x, f(pt.x)-eps), c(pt.y, f(pt.y

Re: [R] ANCOVA for linear regressions without intercept

Thanks Bert. I have read "?formula" again and again, and I'm still struggling; >lm(body_length ~ head_length-1) This removes intercept from each individual regression (for male, female, unknown). When they are taken together, >lm(body_length ~ sex*head_length) This shows differences in slope

[R] principal components

HI all, I am trying to compute the EOF of a matrix using prcomp but unable to get the expansion co-efficients. is it possible using prcomp or are there any other methods thanks nuncio -- Nuncio.M Research Scientist National Center for Antarctic and Ocean research Head land Sada Vasco da Gamma Go

Re: [R] Simple lattice question

> -Mensaje original- > De: Peter Ehlers [mailto:ehl...@ucalgary.ca] > Enviado el: jueves, 31 de marzo de 2011 18:09 > Para: Rubén Roa > CC: r-help@r-project.org > Asunto: Re: [R] Simple lattice question > > On 2011-03-31 06:58, Rubén Roa wrote: > > Thanks Peters! > > > > Just a few minor

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