Hi: This seems to work for your example:
matrix(t(cbind(mat1, mat2, mat3)), ncol = 4, byrow = TRUE) HTH, Dennis On Mon, Mar 29, 2010 at 12:44 AM, Ron_M <ron_michae...@yahoo.com> wrote: > > Dear all, > > Ket say I have 3 matrices : > > mat1 <- matrix(rnorm(16), 4) > mat2 <- matrix(rnorm(16), 4) > mat3 <- matrix(rnorm(16), 4) > > Now I want to merge those three matrices to a single one with dimension > 4*3=12 and 4 wherein > > on resulting matrix, row 1,4,7,10 will be row-1,2,3,4 of "mat1", row > 2,5,8,11 will be row-1,2,3,4 of "mat2" and row 3,6,8,12 will be row-1,2,3,4 > of "mat3". For example suppose the matrices are : > > > mat1 > [,1] [,2] [,3] [,4] > [1,] -0.3597661 -0.8725675 0.92033577 0.42461934 > [2,] -1.0431990 -0.5221843 0.31821494 -0.01963307 > [3,] 0.4736285 -1.3917844 0.03776291 0.52503899 > [4,] 0.2341584 0.2959110 -0.33166146 1.22208331 > > > mat2 > [,1] [,2] [,3] [,4] > [1,] 1.0666719 -1.0310117 -1.4418511 -0.2461388 > [2,] 2.0099067 -0.3866974 -0.2978510 0.9377186 > [3,] -1.5532591 -0.1341572 -1.0745971 0.1120120 > [4,] 0.4318782 0.1166596 -0.6320177 -0.4709091 > > > mat3 > [,1] [,2] [,3] [,4] > [1,] -0.15092091 1.11900300 0.7173543 0.3631286 > [2,] -1.09844902 1.55239518 -0.5049884 0.8974597 > [3,] -1.60176717 -0.03991147 -1.2475162 1.4643000 > [4,] -0.06721017 -0.88329791 -1.9875210 -0.7989177 > > then the resulting matrix will be : > > -0.3597661 -0.8725675 0.92033577 0.42461934 > 1.0666719 -1.0310117 -1.4418511 -0.2461388 > -0.15092091 1.119003 0.7173543 0.3631286 > -1.043199 -0.5221843 0.31821494 -0.01963307 > 2.0099067 -0.3866974 -0.297851 0.9377186 > -1.09844902 1.55239518 -0.5049884 0.8974597 > 0.4736285 -1.3917844 0.03776291 0.52503899 > -1.5532591 -0.1341572 -1.0745971 0.112012 > -1.60176717 -0.03991147 -1.2475162 1.4643 > 0.2341584 0.295911 -0.33166146 1.22208331 > 0.4318782 0.1166596 -0.6320177 -0.4709091 > -0.06721017 -0.88329791 -1.987521 -0.7989177 > > -- > View this message in context: > http://n4.nabble.com/Need-help-on-matrix-manipulation-tp1694804p1694804.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org 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.
