similar to: 2^2 factorial design question

Dear R Gurus: I vaguely remember reading that if interaction was present in a factorial design, then the main effect results were suspect. However, I was reading a text which now uses the tests for main effects even if interaction is present. Which is correct, 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.

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

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 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

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

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! 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

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

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

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 ...

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

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

Hi R Gurus. I'm trying to install the Rmpi package. Here are the errors: checking for stdint.h... yes checking for unistd.h... yes checking mpi.h usability... no checking mpi.h presence... no checking for mpi.h... no Try to find libmpi or libmpich ... checking for main in -lmpi... no libmpi not found. exiting... ERROR: configuration failed for package 'Rmpi' ** Removing

Hi R Gurus! There was a function in S called "usa()" which would plot the US. I found map('usa') in R for the lower 48 states. Is there a way to include Alaska and Hawaii as well, please? Thanks, Edna Bell

Hi R Gurus! When creating a matrix, is it better to use the structure function or the matrix function, please? Thanks, Edna Bell

Hi R Gurus: I'm putting together an article about some R stuff in Latex. I refer to packages and functions. I think that I use {\em} for packages and {\tt} for functions. Is that correct, please? Thank you in advance! Sincerely, Edna Bell

Dear R Gurus: I'm building a package and am wondering whether to use S3 or S4 methods. Any advice, please? Thanks, Edna Bell

Dear R gurus: Here is the following from Montgomery's Design and Analysis of Experiments, 5th edition. > str(rout1.df) 'data.frame': 16 obs. of 3 variables: $ resp: num 18.2 18.9 12.9 14.4 27.2 24 22.4 22.5 15.9 14.5 ... $ A : Factor w/ 2 levels "-1","1": 1 1 1 1 2 2 2 2 1 1 ... $ B : Factor w/ 2 levels "-1","1": 1 1 1 1 1 1 1 1 2