XploRe Help : op

Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Group:	Operators
See also:	+ - .* / ^ %

Function:		*
Description:		* computes the matrix multiplication of arrays.

Usage:	*`z = y x`**
Input:
	`x`	array
	`y`	array
Output:
	`z`	array

Note:

if one or both arguments are scalar, then the usual elementwise multiplication is computed. Otherwise the number of cols of x has to be equal to the number of rows of y.

Note:

The special operator '* computes for x'*y first the transposition of x and then multiplies it with y.

Example:

(#(3,4)~#(1,2))*#(2,3)

Result:

Contents of _tmp



[1,]     9

[2,]     14