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.