関連ワード:  numpy make 2d array    numpy make 2d array from two 1d arrays    numpy make 2d array from 1d    numpy make 2d array into 1d    numpy make 2d array of zeros    numpy make 2d array 3d    numpy define 2d array    numpy generate 2d array    numpy create 2d array with random values    numpy create 2d array with same value