# Data Structures ## 1. Matrices See [[Matrix]]. Usage: ``` import numpy A = numpy.matrix([[1, 0, 0], [0, 1, 0], [0, 0, 1]]) B = numpy.matrix([[2, 3, 4], [5, 6, 7], [8, 9, 10]]) print(A*B) ``` ## 2. Array