search for: readmat

...lo I have a matlab MAT file that contains one single variable: a. The structure of a is as follows: a.river1.flow (flow values) a.river1.date_flow (date) a.river1.precip (precipitation values) a.river1.date_precip a.river2.flow a.river2.date_flow a.river2.precip a.river2.date_precip I have used readMat to load the variable a in R, however I have no idea how readMat translates a. I managed to get some values out of data=readMat("matfile.mat") data$a[,,1]$river1[,,1]$flow -> Why do I need [,,1]? Why not data$a$river1$flow? Many thanks Ed

...p="") + + pattern <- sprintf("-v%d.mat$", version) + filenames <- list.files(pattern=pattern, path=path, full.names=TRUE) + + for (filename in filenames) { + cat("Reading MAT file: ", basename(filename), "\n", sep="") + mat <- readMat(filename) + if (interactive()) { + cat("Press ENTER to view data:") + readline() + } + print(mat) + } + } it gives the following output. Loading all MAT v4 example files in /home/atul/R/x86_64-pc-linux-gnu-library/2.6/R.matlab/mat-files... Reading MAT file: Mat...

Dear users, I am stucked with a programming problem: I am trying to download a squared adjacency matrix from matlab with only 0 or 1. Doing it without a loop at first, I get an error message that is, I think, related to the "mat_adj<-readMat(pathnames_adj)" line. Did anybodz encouter already that problem? If so, do I need to change anything in my code in order it not to be recurrent? If I run the code a second time, it works fine, but this does not help me, as I try to set up a loop for 265 matlab adj matrix, each number represent...

...o find a way to painlessly move structured data back and forth between R and Matlab (also Octave). For this purpose I found the R.matlab package great help. I wish to use a Matlab -v6 MAT file as an intermediary format, because it is well read by both Matlab and Octave. It is also well read by 'readMat' function in R.matlab package, but that is where I run into problems because of poor knowledge of R. By structured data I mean data in data frames in R and the closest equivalent - structures in Matlab. Here is what I have done. ----------------------------------------------------- Make a dat...

To make R.matlab's readMat work for me[1] I needed access to zlib's uncompress function. R already links with zlib, and sometime last year I hobbled together a quick package to get at a few functions. It's my first package, so I would love feedback both on the package and its purpose. I've dropped a temporary c...

...ading required package: R.oo Loading required package: R.methodsS3 R.methodsS3 v1.2.0 (2010-03-13) successfully loaded. See ?R.methodsS3 for help. R.oo v1.7.2 (2010-04-13) successfully loaded. See ?R.oo for help. R.matlab v1.3.1 (2010-04-20) successfully loaded. See ?R.matlab for help. > f <- readMat("freq.mat") Error: cannot allocate vector of size 296.5 Mb On the other hand, if I save the same data in ascii format (from octave: "save -text"), resulting in a 75MB file, then I can load it without problems with the read.octave() function from package foreign. Is this a known...

Hi, Suppose I have a matrix of size 256x14x32 in MATLAB. I want to import that into R. I used readMat and then do.call. But the variable is stored as an array as its done in R. However, I want to define a variable W=array(0,c(256,14,32)) in R and read the multidimensional matlab variable into W. I am not able to do this in R. Please, could you help ? Thanks Gopi [[alternative HTML version delete...

Is there any way to read these files (standard .mat files, created by matlab version 7 onwards are compressed)? I know that R.matlab doesn't read them (it even says in the file MatlabServer.m "Matlab v7 saves compressed files, which is not recognized by R.matlab's readMat()" (lines 47-8)). I know I should be able to make R call Matlab and transfer data (not that I managed to make it work yet!), but I'd rather not run Matlab & R together: I'd like to use R to read matlab files on machines not licensed for matlab! Are there any ways to make this wor...

...ERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] R.utils_1.5.0 R.matlab_1.3.1 R.oo_1.7.3 R.methodsS3_1.2.0 > traceback() 5: file(con, open = "rb") 4: readMat.default(filename) 3: readMat(filename) 2: getVariable.Matlab(matlab, "B") 1: getVariable(matlab, "B") Thanks, Michael

Dear R-people, I am trying to read a matlab file, unfortunately without success. I enclosed the zipped file. Do you have an idea how to read this file by ReadMat package into the R system? Thanks for your time! Wim Krijnen

Hi: I've looked around and I must be missing it because it's probably somewhere. Does someone know how to convert an object of class dgCmatrix to a regular matrix. I can send someone the data if they need it but it's too big to include here. I read the data in using temp<-readMat("movielens.mat") where readMat is from the R.matlab package. But the resulting 2 matrices are S4 object of class dgCmatrix with 6 slots shown below. In the end, I'd actually want to put the 18000 elements of the second matrix into the appropriate locations of the first matrix ( firs...

Hello I need to run an r-file that works on Windows on MAC. The first lines of the file are: library(R.matlab) library(Rcompression) Somehow I cannot find where Rcompression is. Am I missing something? Many thanks Ed

Hello, I have problems running the R.matlab package. I work with R 2.3.1, under windows (using the Rgui). It seems that, even after loading the package, the "simple" functions such as writeMat() or readMat() are not recognized. For example, the following script leads to an error: > install.packages("R.matlab") --- Please select a CRAN mirror for use in this session --- essai de l'URL 'http://cran.miroir-francais.fr/bin/windows/contrib/2.3/R.matlab_1.1.2.zip' Content type &...

.../tmp/R* I tried both current version of R.matlab and older version because of bug https://stat.ethz.ch/pipermail/r-help/2008-September/173432.html A <- matrix(1:27, ncol=3) B <- as.matrix(1:10) fn <- paste(tempfile(), ".mat", sep="") writeMat(fn, A=A, B=B) data <- readMat(fn) print(data) unlink(fn) onWrite <- function(x) writeBin(x$length, con=x$con, size=4, endian="big"); writeMat(fn, A=A, B=B, onWrite=onWrite) Does generate a file in /tmp/Rtmpjhfjxw -rw-r--r-- 1 dst dst 396 2008-09-27 12:46 file643c9869.mat When I try to read it into Matlab I get...

Dear R users, I am tryting to save an 3d array to a matlab file like the following. A <- array(1:24, c(2,3,4)) writeMat(filename, A=A) But if I load the mat file from Matlab, it is not 3d matrix anymore. Does anyone know how I can preserve the 3d structure? Any help will be greatly appreciated. Minho Chae [[alternative HTML version deleted]]

Dear R users, I work with Matlab & R simultaneously. Usually I used to read successfully mat files (cell, structure, etc.) into R, till Matlab 2011b release. For reading mat files (or maybe I should say, converting it into R variable or structure) I’m using *readMat* (from “R.matlab” package). Even saving mat files in one of the previous formats (which can bet set in preference panel) didn’t resolve my problem. When I want to load mat file, created by Matlab 2011b release by using following commands: *require(R.matlab)* *require(utils)* *require(Rcom...

Hello, I have a data file originally as .mat file from matlab that I imported in R using the R.matlab package (readMat). This loaded a list containing amongst other things a 4x4 array of rainfall data that is quite heavy (around 40 Mb, it took 10 minutes to load on my computer). I tried to export it as R data file or simply a text file (using the command write) to share this data with other R users. When I...

Hi, I have a 4D data file from MATLAB, call it X, that I want to analyze in R. The first 3 dimensions are x y z coordinates and the forth is a value in time. If you took a sample vector in matlab it would look like vec1 = X(x1, y1, z1, :) vec2 = X( x2, y2, z2, :) this would give you all values (I have 300 of them) corresponding to this (x1,y1,z1) point of X. Now I read the MATLAB datafile 4D

...would like indeg1, indeg2,...,indeg265. Rm(list()) library(R.matlab) library(igraph) path<-("D:/adj_matrices/nonweighted_GOVSOV") setwd(path) vector.files<-paste("nonweighted_GOVSOV",1:265, ".mat",sep="") dat<-list() for(i in 1:265) { dat[[i]] <-readMat(file.path(path,vector.files[i])) adj<-do.call(rbind, dat[[i]]) g<-graph.adjacency(adj, mode=c("directed"), weighted=T) # the graph object of the network a<-length(V(g)) #the number of nodes indeg<-rep(0,a)...

Dear Group, I am looking for ways to use R and Matlab. Doing the data transformations in R and using the data in Matlab to analyze with some pre-defined scripts. Any good ways to transfer the data into matlab in its most recent version? I tried using R.matlab but the writeMat output is not readable by Matlab. I just need to output a data.frame and read it as is into matlab where I can do any