matrix-nth ( pair matrix -- elt ) (original) (raw)

Vocabulary
math.matrices

Inputs

Outputs

Word description
Retrieve the element in the matrix at the zero-indexed row, column pair.

Notes

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

Errors

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

Examples
Get the entry at row 1, column 0.

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

Definition