If v is a vector, as.matrix(v) and t(v) give row and column matrices and matrix(v,nrow=nr, ncol=nc) gives a matrix with nr rows and nc columns such that the vector fills the first column, then the second, etc. You only have to provide nr or nc in most cases.
If m is a matrix c(m) is a vector formed by stringing out the columns one after another. as.vector is similar. Date: Fri, 3 Dec 2004 11:39:57 +0100 From: Gwenael Jacob <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Subject: [R] vector to matrix transformation Dear, Some analysis (linear regression) can only be done from a vectorized dataset whereas others require a matrix (Mantel tests). I use the two analyses and thus need to format my data in matrix and vector. I spent some time trying to solve the problem and I just gave up. Did anyone knows how to transform a matrix into a vector and back-transform a vector into a matrix? Thanks by advance, Gwenaël Jacob -- ------------------------------------- Gwenaël JACOB Division Biodiversity Swiss Federal Research Institute WSL Zuercherstrasse 111/Postfach CH-8903 Birmensdorf SWITZERLAND Phone : ++41 1 7392 504 Fax : ++41 1 7392 215 ______________________________________________ [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
