similar to: factor question

Hi all, I had some trouble in?regrouping factor levels for a variable. After some experiments, I have figured out how I can recode to modify the factor levels. I would now like some help to understand why some methods work and others don't. Here's my code : rm(list=ls()) ###some trials in recoding factor levels char<-letters[1:10] fac<-factor(char) levels(fac) print(fac) ##first

Dear R Gurus: Is there a problem with Rmpi on x86 with SUSE 10.1, please? I've tried everything and it still won't load. Has anyone else dealt with this please? Thanks, Edna Bell

Hi R Gurus! This is definitely off topic, but I thought I'd try: what is the way to put in url's into a Latex file, please? I know that you start with a \newcommand statement, with some kind of argument that will change, but I'm not sure how to set it up, please. thanks, Edna Bell

Dear R Gurus: I read somewhere that functions are considered vectors. Is this true, please? thanks Edna Bell

Hi R Gurus! I have a package that I am putting together. I waited until the end to do the documentation and would like to generate a set of "empty" .Rd files. Is there a quick way to do this, please? Thanks, Edna Bell PS I can't seem to access the "Writing R Extensions" manual from 2.6.1 on Windows.

Dear R gurus I would like to take a monthly time series and convert it to a data frame without losing the tsp items, pleae I've tried as.data.frame and data.frame but I get the series without the time element. Any suggestions, please? tia Edna Bell

Hello R Gurus: I would like to take a character string and split at the $ sign. I thought that strsplit would do it, but here are the results: > vv [1] "whine$ts1" > vv [1] "whine$ts1" > strsplit(vv,"$") [[1]] [1] "whine$ts1" Does anyone have any suggestions, please? Thanks, Edna Bell

Dear R Gurus: I'm working slowly through "R Programming for Bioinformatics", which is really interesting! Anyway, my question now is: what determines if a function is a builtin vs. a closure, please? For instance: > typeof(sqrt) [1] "builtin" > typeof(mean) [1] "closure" > Thanks, Edna Bell

Dear R Gurus: Is there a test for a single variance available in R, please? Thanks, Edna Bell

Dear R Gurus: I'm trying to find R on another Linux system. I'm using the find command, (surprise), but I only want to see the output where it exists, not all of the other stuff. Is there an option that I could select, please? Right now I have find / -name R TIA, Sincerely, Edna

Hi, I wish to compute multivariate test statistics for a within-subjects repeated measures design with anova.mlm. This works great if I only have two factors, but I don't know how to compute interactions with more than two factors. I suspect, I have to create a new "grouping" factor and then test with this factor to get these interactions (as it is hinted in R News 2007/2), but

Hi R Gurus! I have 2 questions, please: a. I'm putting together a little baby package on SUSE Linux 10.1. I want to create a zip of the package for windows. How should I create that please? b. I don't know if the following is possible but here it is: I have R and a bunch of libraries set up very nicely. I would like to hand off this setup to someone else. Should I just copy

Hi! What is the difference between using data(somedataset) vs. attach(somedataset), please? thanks, Edna Bell

I have put together a test class and methods > setClass("foo",representation(x="numeric")) [1] "foo" > setMethod("plot","foo",function(x,y,...)boxplot(x,...)) [1] "plot" > x <- rnorm(100) > class(x) <- "foo" > plot(x) > y <- new("foo",x=rnorm(50)) > class(y) [1] "foo" My

Hi again! Suppose I have the following: > xy <- round(rexp(20),1) > xy [1] 0.1 3.4 1.6 0.4 1.0 1.4 0.2 0.3 1.6 0.2 0.0 0.1 0.1 1.0 2.0 0.9 2.5 0.1 1.5 0.4 > table(xy) xy 0 0.1 0.2 0.3 0.4 0.9 1 1.4 1.5 1.6 2 2.5 3.4 1 4 2 1 2 1 2 1 1 2 1 1 1 > Is there a way to set things up to have 0 - 0.4 0.5 - 0.9 etc. please? I know there is the cut

Dear R Gurus: How do I find the functions which are primitives, please? Thanks, Edna Bell

Hi R Gurus! I'm trying to create a test package using the package.skeleton function. I wanted to add some compiled code too. In the src library, I put together a baby subroutine, compiled it and created a test.dll When I use the R cmd build, it works fine. But I get into trouble with the R CMD check section. /home/Desktop/R-2.5.1/bin # ./R CMD check mypkg * checking for working latex ...

Let's say I have a within-subject experiment with 2 observables, obs1 and ob2 and 2 independent factors, fac1 and fac2. I can do summary( aov( obs1~fac1*fac2 + Error(Subject/(fac1*fac2)) ) ) summary( aov( obs2~fac1*fac2 + Error(Subject/(fac1*fac2)) ) ) to test the 2 observables separately. > summary( fit<-manova( cbind(obs1,obs2)~fac1*fac2 + Error(Subject/(fac1*fac2)) ) ) gives

Hey, hopefully there is an easy way to solve my problem. All that i think off is lengthy and clumsy. Given a data.frame d with columns VALUE, FAC1, FAC2, FAC3. Let FAC1 be something like experiment number, so that there are exactly the same number of rows for each level of FAC1 in the data.frame. Now i would like to scale all values according to the center of its experiment. So i can apply s

Hi R Gurus: Here is some code that I was experimenting with, please: > f1 <- function(x) { + e1 <- new.env(parent=.GlobalEnv) + environment(e1) + print(environment()) + return(mean(x)) + } > f1(1:15) <environment: 0x02525444> [1] 8 > My question: why isn't the environment within the function set to e1, please? Thanks, Edna Bell