similar to: Matrix subsetting with rownames

Hi, Here is another problem with data frame subsetting: > df <- data.frame(aa=1:3) > value <- data.frame(aa=11:12, row.names=c("A", "B")) > `[<-`(df, 4:5, , value=value) aa 1 1 2 2 3 3 A 11 B 12 > `[<-`(df, 5:4, , value=value) aa 1 1 2 2 3 3 B 12 A 11 For this last result, the rownames of the

Hello, I have stumbled upon a few cases where the behaviour of naming and subsetting in matrices seems unintuitive. All those look related so wanted to put everything in one message. 1. Why row/col selection by names with NAs is not allowed? x <- setNames(1:10, letters[1:10]) X <- matrix(x, nrow=2, dimnames = list(letters[1:2], LETTERS[1:5])) x[c(1, NA, 3)] # vector: works

Hi, Any help on the following would be much appreciated I wish to capture the output (currently going to console) from an external executable. The executable is successfully run using system("program -switch ") and the output printed to the DOS console. How do I capture this output? I have tried redirecting the output to a text file, and then reading this in

Dear R-community, I am using R (V 2.14.1) on Windows 7. I have a dataset which consists of 19 variables for 91 individuals or rows. Two of my variables are Age (adult/chick, with no NA values) and Sex (0 for females/1 for females, with quite a few NA values). The sex of many adult birds is unknown (entered as NA in dataframe). At some point of my analyses, I happen to need to need to work with

I have the following problem. It is not of earthshaking importance, but still I have spent a considerable amount of time thinking about it. PROBLEM: Is there any way I can have a single textfile that contains both a) data b) programcode The program should act on the data, if the textfile is source()'ed into R. BOUNDARY CONDITION: I want the data written in the textfile in exactly

Hello. I have an R program that calls gawk (GNU Awk 3.06 for Windows) from within pipe() to preprocess a large file before it is read into a data frame with read.table(). I've recently upgraded from Win98SE to WinXP, and have also upgraded from R1.5.0 to R1.6.1 over the past month or so. This program worked before the upgrade(s), but now fails. I observe the following sort of behavior with

Karolis wrote: > Hello, > I have stumbled upon a few cases where the behaviour of naming and subsetting in matrices seems unintuitive. > All those look related so wanted to put everything in one message. > 1. Why row/col selection by names with NAs is not allowed? > x <- setNames(1:10, letters[1:10]) > X <- matrix(x, nrow=2, dimnames = list(letters[1:2],

Hello here. I'm struggling to understand R's subsetting behavior in couple of edge cases - subsetting row in a single column matrix and subsetting column in a single row matrix. I've read R's docs several times and haven't found answer. Consider following example: a = matrix(1:2, nrow = 2, dimnames = list(c("row1", "row2"), c("col1"))) a[1, ] # 1

Hello, I did send this message to r-help and got no reply, no I am resubmitting here in case this was a bit too specific for the other list. Many thanks, Iago From: Iago Mosqueira <imosqueira@suk.azti.es> To: r-help@stat.math.ethz.ch Subject: Subsetting using dimnames on S4 array-based class

Hi, I am subsetting a matrix thus: test [,1] [,2] [,3] [1,] 1 7 13 [2,] 2 8 14 [3,] 3 9 15 [4,] 4 10 16 [5,] 5 11 17 [6,] 6 12 18 test[cbind(c(1,3,5), c(2,1,3))] [1] 7 3 17 This works fine, and is the equivalent of c(test[1,2], test[3,1], test[5,3]). cbind(c(1,3,5), c(2,1,3)) would obviously look like: [,1] [,2] [1,] 1 2 [2,]

Thank you for such a quick reply, here are some points that I think might have been missed: > I would state the question the other way : why are NAs integer indices allowed? > In my experience, they are sometimes useful but they often delay the detection of bugs. However, due to backward compatibility, this feature cannot be removed. Adding this feature to character indices would worsen the

I find that after subsetting (you may prefer "conditional selection") a data frame and assigning it to a new object, the str(new object) reflects the original data frame, not the new one: A <- rnorm(20) B <- factor(rep(c("t", "g"), 10)) C <- factor(rep(c("h", "l"), 10)) D <- data.frame(A, B, C) str(D) # reports correctly E <-

Hi I got a problem with creating a textfile: how can I create a textfile, which has a headline like: #data1 1 2 3 4 5 6 7 8 the problem is, how to bind text and matrix, so that the "read.table"-function will ignore the text and read the numbers. Thank you for help Michael -- 2

I'd like to propose adding "strict" versions of the subsetting operators "[", "[[", and "$" to the R language. These strict versions would be intended for use in programming rather than in interactive use. They do not perform any form of partial string matching or opportunistic simplification such as dimension dropping by default. They allow more

Hi, i have a annoying problem that drives me crazy. We have set up a Digital/Unix box with samba and the clients (W95) can mount the shares from this box. On the Unix side we create a textfile which will be periodically (or not) appended with new data. A Application on the W95 side reads this file. The Problem is, that the textfile has new lines, the Application don't see them !!! To

Hi, I'm subsetting a named vector using character indices. My vector of indices (or keys) is 10x longer than the vector I'm subsetting. All my keys are distinct and only 10% of them are valid (i.e. match a name of the vector being subsetted). It is surprisingly slow: x1 <- 1:1000 names(x1) <- paste("a", x1, sep="") keys <- sample(c(names(x1),

Hi all. I am going to do a simple "voting application" for a radiostation. The idea is to have listeners call in to vote on songs. What I want to do is to take a phonenumer for each song and present the result on a simple webpage. Eg. To vote on song number one, call 555-1111 To vote on song number two, call 555-2222 etc etc. When the listener calls in, a playback tells him:

Hi all, I have an object that looks (roughly) like the following: l <- list(a = matrix(rnorm(9), 3), b = matrix(rnorm(9), 3), c = matrix(rnorm(9), 3)) l$a[3,] <- sample(c("Message 1", "Message 2", "Message 3")) l$b[3,] <- sample(c("Message 1", "Message 2", "Message 3")) l$c[3,] <- sample(c("Message 1",

Hello Everyone: As usual, thanks in advance for any help. I was hoping to get some more advice on this question: I'm trying to write a subsetting routine for an S3 object I've created -- lets call it myObject. myObject has a few attributes basically of type string and numerics. Its atomic value is just a vector of ints. I want to write my own subsetting routine to subset myObject in

hello there, I ` m a newbie in R so please excuse my maybe simple question! I have several (the number of the files changes) textfiles. Each textfile contains one column with 3 rows (3 numerical values). I want to combine each file with another file and create new textfiles which then contain 2 columns with 3 rows. How can I do this in R? Do I have to use cbind? How Do I use cbind for my