【numpy】行列操作【その1】
numpyの行列操作で面白い行列の作り方を知ったので書く.
a = np.arange(1,11) b = np.arange(0,10) #b: [0,1,2,3,4,5,6,7,8,9] c = b[:,np.newaxis] #c: #[[0] # [1] # [2] # [3] # [4] # [5] # [6] # [7] # [8] # [9]] d = a + c #[[ 1 2 3 4 5 6 7 8 9 10] # [ 2 3 4 5 6 7 8 9 10 11] # [ 3 4 5 6 7 8 9 10 11 12] # [ 4 5 6 7 8 9 10 11 12 13] # [ 5 6 7 8 9 10 11 12 13 14] # [ 6 7 8 9 10 11 12 13 14 15] # [ 7 8 9 10 11 12 13 14 15 16] # [ 8 9 10 11 12 13 14 15 16 17] # [ 9 10 11 12 13 14 15 16 17 18] # [10 11 12 13 14 15 16 17 18 19]] X = 1./ d # 1.をdの要素で割った形
