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Hello Duncan, thank you for your reply. I will have a look at the misc3d package and at contour3d and kde3d in particular. Cheers, Lutz

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Hi all, does anyone know if there exists some library that implements the sensitivity tests for matched pairs and unmatched groups proposed in Rosenbaum's Observational Studies (2002: ch.4)? Cheers, Holger

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You need strptime("20030301","%Y%m%d")$wday See ?strptime ?POSIXlt Lutz > Putting it simly I have a date in format YYYYMMDD > Year month day > 20030301 > and I need simply the day of the week as an integer or even...

Start R. Enter help.start() Read "Introduction to R" to understand the basics. Then in R enter ?help.search and understand how to use that function for finding what you need. For instance, try ?mahalanobis and review the examples at...

> I want to start R processes on multiple processors from single shell > script > and I want all of them to have different random seeds. The usual way would be using the process ID for the initialization. Or the shell script...

Hello everybody, I'm looking for a library or function to calculate a workweek from a given date, but I didn't found it. Could anybody help, please? Thank you in advance! Best regards, Lutz Thieme -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list...

I'm afraid I do not understand what you need. What is sampled from where and what do you need to keep constant? And what is the relationship between the 'column' and the 'factor column'? Maybe you can provide a...

Hello everybody, is there an easy way to plot boxplot with weighted data (without multiplieing my data)? Thank's in advance Kind regards, Lutz Lutz Thieme Product Engineering AMD - Saxony Manufacturing GmbH phone: + 49-351-277 - 4269 fax: + 49-351...

Ronaldo, > what is the minimal hardware requirement for run R on windows 9x? My R 1.8.0 installation (on Windows XP) requires 42 MB of disk space. The R process, after starting, requires about 20 MB of virtual memory...

Dear All, I'm analysing a negative binomial dataset from a population-based study. Many covariates were determined on household level, so all members of a household have the same value for those covariates. In STATA, there seems to be...

Dear List, having searched the help and archives, I have the impression that there is no automatic model selection procedure implemented in R that includes/excludes predictors in logistic regression models based on LRT P-values. Is that true, or...