R won't do variable interpolation inside quotation marks as perl does. You could try amending your code with, for e.g.
file.name<-paste(sep="/","data_files",files[[i]]) x<-read.table(file.name) Regards, Mike On 9/4/06, Ffenics <[EMAIL PROTECTED]> wrote: > Hi there > I want to be able to take all the files in a given directory, read them in > one at a time, calculate a distance matrix for them (the files are data > matrices) and then print them out to separate files. This is the code I > thought I would be able to use > (all files are in directory data_files) > for(i in 1:length(files)) > + { > + x<-read.table("data_files/files[[i]]") > + dist<-dist(x, method="euclidean", diag=TRUE) > + mat<-as.matrix(dist) > + write.table(mat, file="files[[i]]") > + } > But I get this error when I try to open the first file using read.table > Error in file(file, "r") : unable to open connection > In addition: Warning message: > cannot open file 'data_files/files[[i]]' > if I try the read.table command without the quotation marks like so > x<-read.table(data_matrix_files/files[[i]]) > I get the error > Error in read.table(data_matrix_files/files[[i]]) : > Object "data_matrix_files" not found > But if I go to the directory where the files are kept before starting up R, > the read.table command without the quotation marks works. > I don't want to start up R in the same directory as the where the files I > will be using reside though so how do I rectify this? > Any help much appreciated > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Regards, Mike Nielsen ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.