dimension ( matrix -- dimension )
Matrix operations
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Vocabulary
math.matrices

Inputs
matrixa matrix


Outputs
dimensiona pair


Word description
Find the dimension of the input matrix, in the order of { rows cols }.

Notes
• This word is intended for use with "flat" (2-dimensional) matrices.
• Not to be confused with dimensionality, or the number of dimension scalars needed to describe a matrix.


Examples
USING: math.matrices prettyprint ; 4 30 1 <matrix> dimension .
{ 4 30 }

USING: math.matrices prettyprint ; { } dimension .
{ 0 0 }


Definition
USING: arrays kernel sequences sequences.private ;

IN: math.matrices

: dimension ( matrix -- dimension )
[ { 0 0 } ] [ [ length ] [ first-unsafe length ] bi 2array ]
if-empty ;