MULT_COLUMNS _ _ _ _ _ _ _ _ _ _ _ _ operator

Mult columns, mult rows:

syntax:

<matrix> :- a matrix.

<column\_list> :- a positive integer or a list of positive integers.

<expr> :- an algebraic expression.

mult_columnsreturns a copy of <matrix> in which the columns specified in <column\_list> have been multiplied by <expr>.

mult_rowsperforms the same task on the rows of <matrix>.

examples:

mult_columns(A,{1,3},x); 

  [ x   2  3*x]
  [           ]
  [4*x  5  6*x]
  [           ]
  [7*x  8  9*x]



mult_rows(A,2,10); 

  [1   2   3 ]
  [          ]
  [40  50  60]
  [          ]
  [7   8   9 ]

Related functions: add_to_columns, add_to_rows.