similar to: p-values for classification

Hi everybody, I have a strange behavior of the as.Date() function. For example: as.Date(36525, origin="1900-01-01'") I would expect to get 2000-01-01. But R gives me [1] "2070-01-01" I tried with several origins but the results are still the same. It seems that the origin does not apply and remains 1970-01-01. Does anyone can give me a hint how to

Hi everyone I have the following problem: My dataframe has 3 variables: ID, Year and and an outcome variable. The dataframe contains repeated measurements because the subjects filled out a questionnaire every year. The time span covers 2 years. Now I want to check if there is a significant change in the outcome over the 2 years with a paired wilcox.test. The problem: Not every subject

I would like to build a package for the HT HG-U133+ PM arrays from affy, but I can't find any good documentation on how to go about it. Naively using makecdfenv's make.cdf.package() causes R to seg-fault. I'm unfamiliar with the CDF format as such, but I'm guessing that it's changed somewhat because the PM arrays no longer have P/A and mismatches. I'm looking to build

Hi, I’m Nicole Haenni and I'm doing research for my thesis at the University of Berne (scg.unibe.ch) with Mircea Lungu and Niko Schwarz. We are researching on monitoring the activity in software ecosystems. This is a study about information needs that arise in such software ecosystems. I need your help to fill out the survey below. It takes about 10 minutes to complete it. A software

Hello all R-user I am relative new to the R-environment and also to GLMM, so please don't be irritated if some questions don't make sense. I am using R 2.0.0 on Windows 2000. I investigated the occurrence of insects (count) in different parts of different plants (plantid) and recorded as well some characteristics of the plant parts (e.g. thickness). It is an unbalanced design with 21

Hi Vijay, > I am Vijay Mahantesh SM from India. I am an open > source enthusiast and a big fan of computational mathematics and research. > I came across the idea list of mentioned in the link<http://trac.xapian.org/wiki/GSoCProjectIdeas> and > was fascinated to find projects of my passion. As per my understanding of > the project, this project requires a good

Hi R help list I'm simulating logistic regression data with a specified odds ratio (beta) and have a problem/unexpected behaviour that occurs. The datasets includes a lognormal exposure and diseased and healthy subjects. Here is my loop: ors <- vector() for(i in 1:200){ # First, I create a vector with a lognormally distributed exposure: n <- 10000 # number of study subjects

Hi List, I'm trying to install aroma.affymetrix, which depend on many packages, affyio is one of them. The task is done on 32-bit Linux without problem. The same task was done on Solaris 9 with R-2.5.1 without problem. Following is the error message when installation affyio. I did try to put a file stdint.h I got from the web in the path, but got more error messages. Jun root@biostatsun1

Hello I'm trying to calculate 2d confindence bounds into a scatterplot using the function "kde2d" (package MASS) and a contour plot. I found a similar post providing a solution - unfortunatly I do not realy understand which data I have to use to calculated the named "quantile": Post URL: http://tolstoy.newcastle.edu.au/R/help/03b/5384.html > (...) > >> Is

Dear List, somebody knows, if the following operation can be done in an easier way? The data rows which should be read into R look like that: 4547;1970.01.01 00:00-1970.01.01 01:00; noData Unitil now we are doing this procedure: 1. Dividing columns which are separated by ";" => temp <- read.table(file ,sep=';', na.strings='noData', strip.white=TRUE) =>

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all I forward an invitation to join the first swiss puppet user group meeting in Berne, Switzerland. It will take place on Thursday, February the 18th at 7 PM. The idea is to kick off meetings on a regular basis at different locations within Switzerland to exchange, learn, discuss and have fun. So stay tuned for further events. cu there! cheers

Dear all, I wanted to let you know about four phylogenetic comparative methods (PCM) packages that have become available on (3 on CRAN and 1 on GitHub) recently that hopefully will be interesting to somebody. Three of them go significantly beyond the Brownian motion (BM) and Ornstein-Uhlenbeck (OU) processes. 1) There is a new version of mvSLOUCH available. The most important change is that the

Dear all, I wanted to let you know about four phylogenetic comparative methods (PCM) packages that have become available on (3 on CRAN and 1 on GitHub) recently that hopefully will be interesting to somebody. Three of them go significantly beyond the Brownian motion (BM) and Ornstein-Uhlenbeck (OU) processes. 1) There is a new version of mvSLOUCH available. The most important change is that the

hi, i've got the following and would like to set the point style for A, B and C myself (eg pch=1, 6 and 16) library(lattice) df <- data.frame(x = log(c(1, 0.5 ,0.2 ,0.12 ,0.06, 1, 0.5 ,0.2, 0.12,0.06, 1, 0.5 ,0.2 ,0.12,0.06)), y = c(1, 2, 5, 14, 24, 51, 50, 50, 49, 54, 100, 101, 103, 97, 95), gr =

Dear useRs, I am happy to announce the publication on CRAN of the qgam package: https://cran.r-project.org/web/packages/qgam/index.html qgam is an extension of mgcv, and provides methods for fitting quantile additive models including parametric, random and smooth effects. For basic examples see the vignette: https://cran.r-project.org/web/packages/qgam/vignettes/qgam.html For more details on

Dear useRs, I am happy to announce the publication on CRAN of the qgam package: https://cran.r-project.org/web/packages/qgam/index.html qgam is an extension of mgcv, and provides methods for fitting quantile additive models including parametric, random and smooth effects. For basic examples see the vignette: https://cran.r-project.org/web/packages/qgam/vignettes/qgam.html For more details on

Using Mathematica, I've performed a hierarchical clustering of 3,107 U. S. counties based on 1995-2000 intercounty migration, using an algorithm of my own devising (see http://arxiv.org/abs/0807.1550). I can also generate the associated 3,107 x 3,107 matrix of ultrametric distances. Unfortunately, as far as I have been able to determine, the Mathematica hierarchical clustering package only

I would like to apply network measures (such as betweenness centrality, upper boundedness, etc.) to a weighted graph with non-integer weights, defined by a euclidean distance matrix. The package sna provides the measures that I want to use, but seems only to operate on binary graphs. I have read work by Mark Newman (http://aps.arxiv.org/abs/cond-mat/0407503/), who suggests that a weighted graph

I am happy to announce that a new version of xlsReadWritePro is available. xlsReadWritePro natively reads and writes Excel files (v97 - 2003) on Windows. The pro version is more powerful than the free version but, beeing a small company, we ask you to support our development and maintenance effort. The following capabilities have been added (compared to xlsReadWrite): ? in-memory objects

Dear R-users I would like to draw a barplot with a special y-axis. Most of my data points are in the range from -50 to 50, apart from one value that is 550. I would now like to have a y-axis from -50 to 50, then a "break" and the "rest" of the y-axis, let's say from 500 to 600. In order to make clear what I'm trying to do, I attached a figure. Is it possible to do