matrix-set-nths ( obj pairs matrix -- )
Matrix operations

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Vocabulary
math.matrices

Inputs

obj	an object
pairs	an assoc
matrix	a matrix

Outputs
None

Word description
Applies matrix-set-nth to matrix for each row, column pair in pairs, setting the elements to obj.

Side effects
Modifies matrix

Notes

•	This word is the multiplexing variant of matrix-set-nth.
•	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
•	Throws an error if the sequence cannot hold elements of the given type.

Examples
Change both entries on row 1.

USING: math.matrices kernel prettyprint ; { { 0 1 } { 2 3 } } "a" { { 1 0 } { 1 1 } } pick matrix-set-nths .
{ { 0 1 } { "a" "a" } }

Definition

USING: kernel sequences ;

IN: math.matrices

: matrix-set-nths ( obj pairs matrix -- )
    '[ _ matrix-set-nth ] with each ; inline