similar to: the real dimnames

I think that the "dimname names" of tables and arrays could make aperm() and apply() (and probably some other functions) easier to use. (dimname names are, for example, created by table() ) The use would be something like: -- x <-table( from=sample(3,100,rep=T), to=sample(5,100,rep=T)) trans <- x / apply(x,"from",sum) y <- aperm( trans,

Hi I'm using kronecker() with a matrix and a vector. I'm interested in the column names that kronecker() returns: > a <- matrix(1:9,3,3) > rownames(a) <- letters[1:3] > colnames(a) <- LETTERS[1:3] > b <- c(x=1,y=2) > kronecker(a,b,make.dimnames=TRUE) A: B: C: a:x 1 4 7 a:y 2 8 14 b:x 2 5 8 b:y 4 10 16 c:x 3 6 9 c:y 6 12 18 > The

Using diag() to extract the diagonal of a matrix loses all but the first dimname (R 0.62.3). The problem seems to be in [ ]: > > x <- matrix(1:9,3,3) > dimnames(x) <- list(c("a", "b", "c"), c("a", "b", "c")) > x a b c a 1 4 7 b 2 5 8 c 3 6 9 > diag(x) a NA NA 1 5 9 > x[c(1,5,9)] a NA NA 1 5 9 > Paul

Hi Everyone, To complete the outer() and kronecker() functions in the base, may I suggest the following tensor() function, which allows the multiplication of arrays through sets of conformable dimensions. I am happy to write a help page if required. The code also needs a setdiff() function which prompts me to ask: what about simple set functions? I expect many of us have written our own

Hi, xtabs() creates a table of counts. I want a table of proportions -- that is, I want to divide every vector (along a particular dimension) by its sum. The tiny example below does that. The call to xtabs() creates a matrix "A" with dimensions ("x1","x2","y"). I transform "A" using aperm() and aaply() to get the matrix "B". The

Hi R-helpers, I have been struggling with calculating row and column statistics, e.g. standard deviation. I know that > datac$Mean<-rowMeans(datac,na.rm=TRUE) will give me row means. I have tried to replicate those row means with the apply function: > datac$Mean2<-apply(datac,2,mean) so that I can replace the function argument with "sd" (instead of mean) to get standard

The code below illustrates some points about results from tapply that I find strange. I wonder if they are intended and if so why it is so. 1) When you make a table the dimnames is a *named* list, tapply returns an unnamed list. 2) data.frame behaves differently on an array and a table. Is this an intended feature? 3) For tables class(TAB) and attr(TAB,"class") both return

I have been tinkering with mosaicplot() and friends as a way of learning R. As part of this, I've written a pair.table() method for mosaic matrices, and would like to extend mosaicplot to work with loglin and logln (MASS) objects. I'm using R 1.4.0 on Win 98. I've been trying to figure out the formula interface, and think there's a bug, but not sure how to find it, yet alone fix

I frequently get data sets with cryptically-named variables. The datasets are more useful to me with informative variable names. I know that I can rename variables using the following command: dimname(dataset[[2]][index.of.variable.to.be.renamed]<-new.variable.name If I want to do this inside a function (say something I call RenameCol) what is the best way to communicate the

Muchas gracias Javier, Lo que yo quiero es cambiar el título de la leyenda que dice "Pearson residuals" a español "Residuales de Pearson", pero no me doy cuenta como. También en lugar de "p-value", que diga "Valor de P". Es posible? Manuel 2013/7/4 Marcuzzi, Javier Rubén <javier.ruben.marcuzzi@gmail.com> > Estimado Manuel Spíndola > >

Hello, the fix of PR18612 (https://bugs.r-project.org/show_bug.cgi?id=18612) in r85380 (https://github.com/wch/r-source/commit/2653cc6203fce4c48874111c75bbccac3ac4e803) caused a change in `dim<-()`. Specifically, in the past, any `dim<-()` assignment would _always_ remove "dimnames" and "names" attributes per help("dim"): The replacement method changes

>>>>> Henrik Bengtsson >>>>> on Sun, 29 Oct 2023 10:42:19 -0700 writes: > Hello, > the fix of PR18612 > (https://bugs.r-project.org/show_bug.cgi?id=18612) in > r85380 > (https://github.com/wch/r-source/commit/2653cc6203fce4c48874111c75bbccac3ac4e803) > caused a change in `dim<-()`. Specifically, in the past,

Is there a reason that array() silently ignores dimnames that are not a list but matrix() gives an error? > str(matrix(11:14, 2, 2, dimnames=c("Rows","Cols"))) Error in matrix(11:14, 2, 2, dimnames = c("Rows", "Cols")) : 'dimnames' must be a list > str(array(11:14, dim=c(2, 2), dimnames=c("Rows","Cols"))) int

Hi Martin, Henrik, I actually like this change. Makes a lot of sense IMO that dim(x) <- dim(x) be a no-op, or, more generally, that foo(x) <- foo(x) be a no-op for any setter/getter combo. FWIW S4Arrays::set_dim() does that too. It also preserves the dimnames if the right value is only adding or dropping outermost (ineffective) dimensions: ??? > x <- array(1:6, dim=c(2,3,1),

Full_Name: Hsiu-Khuern Tang Version: 1.3.0 OS: GNU/Linux (Debian unstable) Submission from: (NULL) (192.6.19.124) Hi all, I am not sure this is a bug rather than an intentional design, but here goes: If I do > a <- matrix(1:4, nrow=2) > dimnames(a)[[1]] <- c("a", "b") I get the following error message because dimnames(a) is NULL: Error: more elements

Hi all, I have a three dimensional array with the corresponding dimension names. I would like to subset the array according to the dimension names. For example, suppose I want to extract the values corresponding to A=20, B=10, C=0. I know I can do: P2[dimnames(P2)$A==20, dimnames(P2)$B==10, dimnames(P2)$C==0] But is there a better way for doing this? Thanks for your help! Hanna >

Hi list, In a function I am writing, I need to extract the dimension names of an array. I know this can be acheived easily using dimnames() but my problem is that I want my function to be robust when the number of dimensions varies. Consider the following case: foo <- array(data = rnorm(32), dim = c(4,4,2), dimnames=list(letters[1:4], LETTERS[1:4], letters[5:6])) # What I want is to extract

Full_Name: Ben Goodrich Version: 2.9.0 OS: Linux (Debian unstable) Submission from: (NULL) (128.103.220.16) row(x), col(x), and functions that call them like lower.tri(x) and upper.tri(x) do not retain the rownames or colnames of x in the matrix that is returned. Example from R version 2.9.0 : x <- matrix(1:9, nrow = 3, ncol = 3) rownames(x) <- LETTERS[1:3] colnames(x) <- letters[1:3]

In Windows XP, the matrix() function crashes the program when 'dimnames' is an empty list: matrix(1:4, nrow=2, dimnames=list()) # R has encountered a problem and needs to close ... This bug is specific to WinXP, as Linux64 handles this situation more gracefully: matrix(1:4, nrow=2, dimnames=list()) Error in matrix(1:4, nrow = 2, dimnames = list()) : invalid type

In the "old days", one way of speeding up matrix calculations was to drop the dimnames of the matrices prior to the calculations, i.e., dimnames(X) <- NULL. I distinctly remember that this could have a great impact at least in Splus 3.x (under UNIX/Linux). I just did a small, informal test of this with a couple of functions I use to fit plsr models, in R 2.3.0 (Linux). It