<coordinate-matrix> ( dim -- coordinates )
Matrix operations

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Vocabulary
math.matrices

Inputs

dim

a pair

Outputs

coordinates

a matrix

Word description
Create a matrix in which each element is its own coordinate pair, also called a cartesian-product.

Notes

•	This word is the non-square variant of <cartesian-square-indices>.
•	Only the first two values in dim are used.

Examples

USING: math.matrices prettyprint ; { 2 4 } <coordinate-matrix> .
{ { { 0 0 } { 0 1 } { 0 2 } { 0 3 } } { { 1 0 } { 1 1 } { 1 2 } { 1 3 } } }

Definition

USING: kernel sequences ;

IN: math.matrices

: <coordinate-matrix> ( dim -- coordinates )
    first2 [ <iota> ] bi@ cartesian-product ; inline