What does multiplying a vector by a matrix do? - TimesMojo

SOLVED:Fig. 17.16 shows part of a MatrixVector class that uses MapReduce to multiply an N ×N matrix by an N-element vector. For simplicity, it creates one mapper task for each matrix entry (in practice, it would be more efficient to have each mapper correspond to a larger submatrix). The input matrix and vector are stored in static vector and matrix fields of the MatrixVector class (lines 3-4). Because Java does not permit arrays to be stored directly in maps or lists, the Mapper and Reducer cla

Chapter 3. Vector - SlideServe