matrixMultiply

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1.92

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Description

Description:: Returns resulting matrix from the multiplication of two matrices. First matrix must be of the size n ✕ k, while the second must be of the size k ✕ m, i.e columns matrix1 == rows matrix2. The resulting matrix will be of the size n ✕ m. If the shapes do not match, empty array [] will be returned.
Groups:: Math Math - Vectors

Syntax

Syntax:: matrix1 matrixMultiply matrix2
Parameters:: matrix1: Array - matrix of the size n(rows) ✕ k(columns)
: matrix2: Array - matrix of the size k(rows) ✕ m(columns)
Return Value:: Array - resulting matrix of the size n(rows) ✕ m(columns)

Examples

Example 1:: [ [2], [2] ] matrixMultiply [ [3] ] /* returns [ [6], [6] ] */
Example 2:: [ [-1,0,0], [0,-1,0] ] matrixMultiply [ [1,2], [3,1], [2,3] ] /* returns [ [-1,-2], [-3,-1] ] */

Additional Information

See also:: matrixTranspose vectorAdd vectorMagnitude vectorNormalized vectorMultiply vectorDotProduct vectorCrossProduct vectorDistance vectorLinearConversion vectorCos vectorFromTo vectorModelToWorld vectorWorldToModel BIS_fnc_transformVectorDirAndUp

Notes

: Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note

: Posted on 30 Jun, 2019
oOKexOo: Note that this command won't transform a 1D array automatically into a column vector [[-1,0,0],[0,-1,0],[0,0,-1]] matrixMultiply [1,2,3] // wrong, syntax error [[-1,0,0],[0,-1,0],[0,0,-1]] matrixMultiply [[1,2,3]] // wrong, will return [] [[-1,0,0],[0,-1,0],[0,0,-1]] matrixMultiply [[1], [2], [3]] // correct, will return [[-1], [-2], [-3]]