;
mat=matrix(2,3) ; matrix of ones
mat
;
array = matrix(2,3,2) ; array of ones
array
;
randomize(111222) ; sets random seed
normal(2,2,2) ; array of normal random numbers
;
x = #(1, 2, 3)
diag (x) ; diagonal matrix
;
library("xplore")
id=unit(3) ; identity matrix
;
dim(mat) ; dimension
;
rows(mat) ; number of rows
cols(mat) ; number of columns
;
dim(array) ; diemension
;
unit(3)~matrix(3) ; horizontal concatenation
;
diag(1:3)|matrix(1,3) ; vertical concatenation
;
textmat = #("aa","c") ~ #("b","d2") ; text matrix
dim(textmat)