similar to: head function

I am sorry to ask such a simple question, but my knowledge of programming language is extremely limited, and I couldn't find the answer in any of the normal resources. I want to do a for loop in which m takes on the values 1, 5, 10, 15, 20. What is the syntax for doing that? I had been doing a loop for m in 1:20, but I only want those values above. Thanks, Brian

dear R group: I have the probably fairly common problem that I would like to have one code.R file do different things if it is invoked from a symbolic link, which should be easy to uncover. $ ln -s code.R code-0.R $ ln -s code.R code-1.R $ R CMD BATCH code-1.R what needs to be in code-1.R to put code-1.r into a character vector? help appreciated. regards, /ivo welch PS : I read

Do you know of a reference that discusses alternative choices for plotting positions for a normal probability plot? The documentation for qqnorm says it calls ppoints, which returns qnorm((1:m-a)/(m+1-2*a)) with "a" = ifelse(n<=10, 3/8, 1/2)? The help pages for qqnorm and ppoints just refer to Becker, Chambers and Wilks (1988) The New S Language (Wadsworth & Brooks/Cole),

Hey, R-listers I want to get some statistical books on Cumulants for studying. So will you please give me some suggestions on these related books? Thanks for your point. Fred

Delving into the murky world of dates and times I found this: dates <- c("02/27/92", "02/27/92", "01/14/92", "02/28/92", "02/01/92") > times <- c("23:03:20", "22:29:56", "01:03:30", "18:21:03", "16:56:26") > x <- paste(dates, times) > z <- strptime(x, "%m/%d/%y

Hello, I have a dataframe with 9 columns, and I would like to sort (order) the right-most eight of them alphabetiaclly, i.e.: ID1 ID2 F G A B C E D would become ID1 ID2 A B C D E F G Right now, I'm using this code: attach(data) data<-data.frame(ID1,ID2,data[,sort(colnames(data)[3:9])]) detach(data) but that's not very elegant. Ideally I could specify which columns to sort and

I'm experiencing a new and annoying phenomenon which seems to consist of an unfortunate interaction between R-1.7.0 and netscape version 7. When I invoke help.start(), a netscape window duly appears with the browser pointed at the file .../R/doc/html/index.html as one would hope and expect. However if I then ask for help on a function, e.g. > help(glm) the help does NOT get displayed

I am having trouble with try and tryCatch. I have read the documentation but I just don't get it. Here is what I am trying to do. I am testing a function which has a number of parameters. I want to test it for different values of the parameters and I have some loops, in the middle of which is a test of the function. Sometimes the routine fails and so I have put the bit that might fail

Hi everyone, I need help. I want to have a "uniform" kind distribution. When I used sample function I got almost twice many zeros compared to other numbers. What's wrong with my command ? temp <-sample(0:12, 2000, replace=T,prob=(rep(1/13,13))) hist(temp) Thanks in advance, Taka,

I am aware of one (unofficial) guide to style for R programming: http://www1.maths.lth.se/help/R/RCC/ from Henrik Bengtsson. Can anyone provide further pointers to good style? Views on Bengtsson's ideas would interest me as well. David Scott _________________________________________________________________ David Scott Department of Statistics, Tamaki Campus The University of Auckland,

This is really a query about MySQL which I am trying to use to set up a database which I will then access with RODBC. I have my data in a .csv file, and some of the fields are date/time fields. I tried to create a table using mysql with the definition of the date/time field given by CallDate DATETIME, but I got an error saying that the first row has 28/07/2006 0:00 in that field. What I

I am having trouble with creating a POSIXct object. If I create a variable of class Date first out of the date part of my data, I am ok, but if I just paste the date and time parts together and try and create the POSIXct object, I have problems. Here is a toy example created from the actual data which caused the problem. I am using R 2.0.1 on Windows XP. > # Data frame with dates and

Subject: Eliminate repeated components from a vector X-Mailer: VM 7.00 under 21.4 (patch 6) "Common Lisp" XEmacs Lucid Reply-To: fjmolina at lbl.gov FCC: /home/f/.xemacs/mail/sent Does anyone know how I can eliminate repeated elements from a vector?

I want to do some recoding of variables: code Age into groups and recode a factor into a smaller number of levels. There are a couple of options for recode functions, in the car package and in memisc, and I think in gmisc. Does anyone have any opinions on the the easiest, most reliable approach for these problems? David Scott _________________________________________________________________

I am looking for a recommendation for an open source competitor to Winzip. I seem to recall Brian Ripley mentioning one in the last year or so, but couldn't find it in the mail archives. (Searching on Ripley there is somehow not terribly useful.) Suggestions? David Scott _________________________________________________________________ David Scott Department of Statistics, Tamaki Campus

Hello R-users, I need to create a vector inserting an 1 after each value of another vector. For example: vec1<-c(2,3,4) I need to create a vector with the values 2,1,3,1,4 Does anyone know how create this vector without loops (vec1 could have 1000 elements) Thank you, Juan -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

Hello List How do I turn R> simple.example.alphabetic [,1] [,2] [,3] [1,] "a" "b" "c" [2,] "d" "e" "f" [3,] "g" "h" "i" into R> simple.example.numeric [,1] [,2] [,3] [1,] 1 2 3 [2,] 4 5 6 [3,] 7 8 9 [ie "a" becomes 1, ..., "z"

Hello everybody I have a generic problem which the following toy function illustrates: f <- function(n) { if(abs(n) < pi) { return(TRUE) } else { return(FALSE) } } I want it to return TRUE if abs(n)<pi and FALSE otherwise. f() is fine as far as it goes, but does not deal well with NA or NaN or NULL (I want these to signal some problem with the

I have just got a new machine and had a basic cygwin installed before it was given to me. It didn't include make. Previously I have installed Rtools to build packages and now I have got myself a bit confused as to whether to just install make from the cygwin packages or to install rtools. I would welcome any advice. I had a look at the rtools section in the Administration Manual and the

Hi everyone This must be a FAQ but I can't find it anywhere... I want a postscript image of a contour() plot, with axes of equal length. Try R> postscript(file="~/f.ps") R> contour(matrix(rnorm(100),10,10)) R> dev.off() This isn't what I want: the plotting region is, as documented, quarter of an inch shy of the paper edge and the axes appear to be different lengths.