similar to: Expressions and Functions

Hi Ryszard! There is a dist function in R. It's in the mva package. You can set the kind of distance that you want. Thanks, Erin mailto:hodgess at gator.uhd.edu

Dear R People: In the function "decompose", the object has the class of "decomposed.ts". (from package stats) I would like to see the class definition and the method for the plotting. However, when I use isClass("decomposed.ts") I get "FALSE". When I check getMethods("plot") there is no method for plot on decomposed.ts Any suggestions,

Dear R People: I am trying to split a character vector into a set of individual letters: Ideal: x3 <- c("dog") "d" "o" "g" I tried the following: > strsplit(x3) Error in strsplit(x3) : argument "split" is missing, with no default > strsplit(x3,1) [[1]] [1] "dog" I know that this is incredibly simple, but what am I doing

Dear R People: Could someone direct me to some documentation on the difference between S3 and S4 classes, please? For example, why would a person use one as opposed to another? Maybe pros and cons of each? Thanks in advance! R Version 2.2.0 (I'm downloading the new one this afternoon!) Windows. Happy New Year! Sincerely, Erin Hodgess Associate Professor Department of Computer and

Dear R People: Suppose I have the following; xa <- c("There are 5 dogs") I would like to have a new character vector such that xb[1] is There xb[2] is are xb[3] is 5 xb[4] is dogs Since the original vector has length 1, substring will not work. Any suggestions would be MOST welcome! thanks Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences

Dear R People: I'm using R in a time series class. This class is being broadcast live to 2 remote sites via closed circuit TV. My people at the remote sites are having a terrible time seeing the computer screen as it is broadcast(resolution issues). I have decided to put together Power Point slides for the teaching. I am currently saving the R screen as WMF files and inserting them into

Dear R People: When will version 1.9 (for Windows) be ready, please? My reason for asking: there is an interesting library from Bioconductor called tkWidgets. However, it will only work with version 1.9.0 or higher. Are there ways around this, or should I just be patient? Thanks so much in advance! Sincerely, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences

Dear R People: I downloaded the RPM for Red Hat Linux. How do I install this, please? When I looked at the R Intallation manual, it seemed to be referring to installing from source. Thanks in advance! Sincerely, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgess at gator.uhd.edu

Dear R People: I will be teaching an undergraduate Design of Experiments class in the Spring Semester. It will be very much an applied course. My question, please: has anyone used R for a course like this, please? I've tried Rcmdr for a regression course and just plain command line for a time series course. Should I use Rcmdr, or teach them to use the command line, OR is there something

Dear R People: Suppose I have the 4 numbers: 1,2,3,4. I would like to create a listing of the permutations of 4 items taken 4 at a time. Is there a built in function for that, please? Thanks in advance! R 2-3-1 for Windows or Linux Sincerely, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgess at gator.uhd.edu

Dear R People: Here is yet another strange problem. I'm using R in one of my classes. However, the computer lab has something called "Deep Freeze" and the students cannot save anything to the hard drive. I had R installed and things were working well. They would save their .Rdata files to disks. Now, we need to add more packages. We can't download and we can't bring

Dear R Users: Was there an answer to the question about using dev.print and win.print to print as horizontal = FALSE, please? I was working on it and I didn't find the solution. R 1.9.1 Windows Thanks, Erin Hodgess mailto: hodgess at gator.uhd.edu

Dear R People: On the Edit menu, there is a GUI preference tab. On the Font option, the highest value is 18. Has anyone ever had the font size set larger than that will any success, please? Thanks, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgess at gator.uhd.edu PS Windows, R 2-2-1

Dear R People: Is there any way to take a Windows version of R, compiled from source, compress it, and put it on a Unix-like environment, please? thanks in advance, Sincerely, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgess at gator.uhd.edu

Dear R people: I have a vector which runs from -1 to 1, by .1, inclusively. Easy to set up. x <- seq(-1,1,.1) I then sample 3 numbers from x. y <- sample(x, 3) Suppose one of my values is -0.7. I want to set up an interval around that y1 <- pmax(y-0.1,-1) y2 <- pmin(y+0.1,1) For the value -.7, the interval will run from -.8 to -.6. There will be several intervals. Again, nothing

Dear R People: I was wondering if there were any packages for parallel programming in R. According to the R-help, at one time there was a package called SNOW. It doesn't seem to exist anymore. Any help would be much appreciated! Sincerely, Erin Hodgess mailto: hodgess@gator.uhd.edu [[alternative(swapped) HTML version deleted]]

Dear R People: Please excuse the off topic question, but I know that I'll get a good answer here. If a single author is writing a journal article, should she use "We performed a test" or "I performed a test", please? I had learned to use "we" without regard to the number of authors. Is that true, please? Thanks for the off topic help. Sincerely, Erin

Dear R People: I'm still struggling with sending methods and classes as part of creating a new package. Where does the .onLoad function go? Within R itself or in a file in one of the new package directories? Here are my latest efforts: Here's the last part of the woof1-Ex.Rout > library('woof1') Error in loadNamespace(package, c(which.lib.loc, lib.loc), keep.source =

Dear R People: When creating a package, how do you include new methods and classes, please? I'm using the pacakge.skeleton command as a starting point. Thanks, Sincerely, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgess at gator.uhd.edu

Dear R People: I have used the "latex" function from the Hmisc package and it is just great! However, I have a new question regarding that function: is there an option for summary(lm(y~x)), please? There are options for different types of objects, but I didn't see one for that. Maybe I just missed it. Thanks in advance! R for Windows Version 2.3.1 Sincerely, Erin Hodgess