matrix-nths ( pairs matrix -- elts )
Matrix operations

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Vocabulary
math.matrices

Inputs

pairs	an assoc
matrix	a matrix

Outputs

elts	a sequence

Word description
Retrieve all the elements in the matrix at each of the zero-indexed row, column pairs in pairs.

Notes

•	This word is the two-dimensional variant of nths.
•	This word is intended for use with "flat" (2-dimensional) matrices.

Errors

•	bounds-error if the first element of a pair in pairs is greater than the maximum row index in matrix
•	bounds-error if the second element of a pair in pairs is greater than the maximum column index in matrix

Examples

USING: math.matrices prettyprint ; { { 1 0 } { 1 1 } } { { 0 1 } { 2 3 } } matrix-nths .
{ 2 3 }

Definition

USING: kernel sequences ;

IN: math.matrices

: matrix-nths ( pairs matrix -- elts )
    [ matrix-nth ] curry map ; inline