I want to flatten a matrix and unflatten it again. Please tell me how to do it.
1. given a matrix: x1 y1 z1 x2 y2 z2 ... xk yk zk convert it to a vector: x1, y1, z1, x2, y2, z2, ..., xk, yk, zk 2. given a vector: x1, y1, z1, x2, y2, z2, ..., xk, yk, zk convert it to a matrix x1 y1 z1 x2 y2 z2 ... xk yk zk It is known that the number of dimensions is 3. Thanks for any help! Bill ______________________________________________ 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
