import numpy as np
人工智能学习 day3上
array=np.arange(1,21)
# boolArray=(array %2==0)
# print(boolArray)
# print(array[boolArray])

# array2=np.arange(1,21).reshape(4,5)
# print(array2[array2>10])
#花式索引
# array=np.array([[1,2,3,4],
# [5,6,7,8],
# [3,4,5,6]
# ])
# print(array[1,2])
# print(array[[1,2],[2,1]])
#转置
# array=np.array([[1,2,3,4],
# [5,6,7,8],
# [3,4,5,6]
# ])
# print(array.T)
#
# array.transpose(0,1)
#文件存储
# array=np.arange(1,21)
# array.tofile('a.bin')
# array=np.fromfile('a.bin',dtype=np.float32)
# array=np.arange(1,21)
# np.save('a.npy',array)
# array=np.load('a.npy')
# print(array)