Chris Ryan <chrisryan <at> wvdnr.gov> writes: : : Hi, : : I have worked long and hard and looked in the manuals and am having a hard time constructing a diagonal : matrix. I can get the diagonals out of a matrix but can't construct the matrix with just the diagonals. I : have been on the web site and manuals and I think that it says to use: : : dsj <- diag (three = 1, nrow, ncol = 7) three is the name of my matrix and dsj is where I'm trying to put it but it : comes back: : : unused argument(s) (three ...) : every time that I try it. : : Am I doing something wrong in trying to make this matrix? : : Thank you very much for your time, Chris Ryan :
Looking at ?diag we see that diag takes 3 arguments: 'x', 'nrow' and 'ncol'. 'three' is not one of them so it is correctly telling you that you specified an unused argument. diag(nrow = 7) # will create a 7x7 identity matrix. diag(1, 7) # same using positional rather than named arguments diag(, 7) # same since x defaults to 1 Look at the examples at the bottom of the ?diag page and try them out by running example(diag) at the R prompt or by just typing them in to get more insight. Also you might consider rereading the Introduction to R manual where it is covered on page 22. ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html