1 #导入numpy模块 2 import numpy as np 3 #通过reshape将一维数组修改为二、三维 4 #创建一个一维数组 5 a = np.arange(1,25) 6 print(a) 7 #将一维修改为二维(2,12) (4,6) (3,8) 8 b = a.reshape((4,6)) 9 print(b) 10 #将一维数组修改为三维(2,3,4) 11 c = a.reshape((2,3,4)) 12 print(c) 13 14 #通过np.reshape()进行修改 15 bb = np.reshape(a,(3,8)) #将一维修改为二维 16 print(bb) 17 #将一维修改为三维 18 cc = np.reshape(a,(4,3,2)) 19 print(cc) 20 21 #将多维数组修改为一维数组 22 d = cc.reshape(24) 23 print(d) 24 dd = bb.reshape(-1) 25 print(dd) 26 27 #通过ravel、flatten函数将多维数组转换维一维数组 28 #flatten 29 e = bb.flatten() 30 print(e) 31 #ravel 32 f = bb.ravel() 33 print(f)
1 [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24] 2 [[ 1 2 3 4 5 6] 3 [ 7 8 9 10 11 12] 4 [13 14 15 16 17 18] 5 [19 20 21 22 23 24]] 6 [[[ 1 2 3 4] 7 [ 5 6 7 8] 8 [ 9 10 11 12]] 9 10 [[13 14 15 16] 11 [17 18 19 20] 12 [21 22 23 24]]] 13 [[ 1 2 3 4 5 6 7 8] 14 [ 9 10 11 12 13 14 15 16] 15 [17 18 19 20 21 22 23 24]] 16 [[[ 1 2] 17 [ 3 4] 18 [ 5 6]] 19 20 [[ 7 8] 21 [ 9 10] 22 [11 12]] 23 24 [[13 14] 25 [15 16] 26 [17 18]] 27 28 [[19 20] 29 [21 22] 30 [23 24]]] 31 [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24] 32 [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24] 33 [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24] 34 [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24]