inv

inv(matrix: any[] | Mat) : any[]

param matrix a 2-D Array or Mat. Should be square and invertible.

returns: any[] - The matrix that is the inverse of matrix i.e. matrix * matrix^-1 = I where I is the identity matrix. (recall identity matrix is 1's on the diagonal and 0's elsewhere)

This function simply finds the inverse of a matrix if it's invertible. One test for invertible matrices is its invertible if the determinant is not zero. ( !(det(matrix) === 0 )