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9 results for “from:Maria Wolters”

converting numerical parts of factors into numeric vectors
Maria Wolters · Apr 28, 2000 · r-help

Dear list, Problem: Given a factor that contains both numerical values and category codes, how can I extract the numerical values and store them in a numeric vector while preserving the exact values? as.numeric() replaces the numerical values by...

Output of Anova (CAR package) in Sweave
Maria Wolters · Jun 16, 2009 · r-help

Dear list, I use Sweave almost exclusively for writing papers, and I have become quite spoiled by the excellent xtable export facilities. Has anybody written an xtable method for the Anova function in CAR, or has anybody used a different...

R: question about vectors + for loop
Maria Wolters · Jun 5, 1999 · r-help

Hi, first of all: I'm not only new to R, but also to S. I hope this is the right forum for asking the following very stupid questions: a) is there a straightforward way of saying for all factors...

sampling from data frame
Maria Wolters · Jun 6, 2002 · r-help

Hello, after searching through the archives and not finding a thread that answers this question, I thought I'd pass it on to the list. Given a data frame and given a factor variable that assigns a class to each...

Factor Analysis?
Maria Wolters · Feb 2, 2000 · r-help

Peter, > Erm, while there is a certain truth to what you're saying, in that > factor analysis is often used by people who find anything non-GUI too > difficult, I don't think that is a valid cause for further...

Wanted: online Introduction to R
Maria Wolters · Nov 13, 1999 · r-help

I do think that there is an audience for a gentle introduction to R - namely those people that need to use (sometimes quite sophisticated) stats, but are neither good mathematicians nor good programmers. People who stopped using SPSS because they...

R Documentation(s)
Maria Wolters · May 3, 2000 · r-help

Two cents from a non-statistician: - I really like the idea of a repository for existing introductions and workbooks. I regularly check the home pages of contributors to this list, and on some, I have found very useful texts created...

Output of Anova (CAR package) in Sweave
Maria Wolters · Jun 16, 2009 · r-help

Many thanks to John Fox, who replied on-list, and to David Hajage, who replied to me off list. David suggested this quick hack of the print.anova.mlm function, which I am sharing with his permission # From print.Anova...

Factor Analysis?
Maria Wolters · Feb 2, 2000 · r-help

Brian Ripley wrote: > My feeling is that there are plenty of packages that do factor analysis, > and not much demand for it in R. Anyone want to write a factor analysis > package for R? Well, IM very HO, the problem...

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