left ([) - left bracket
Left and right brackets are used for vector and matrix concatenation. These symbols are also used to denote a multiple left-hand-side for a function call
Inside concatenation brackets blank or comma characters mean "column concatenation", semicolon and carriage-return mean "row concatenation".
Note : to avoid confusions it is safer to use comma instead of blank to separate columns.
Within multiple lhs brackets variable names must be separated by comma.
[6.9,9.64; sqrt(-1) 0] [1 +%i 2 -%i 3] [] ['this is';'a string';'vector'] s=poly(0,'s');[1/s,2/s] [tf2ss(1/s),tf2ss(2/s)] [u,s]=schur(rand(3,3))