python数组分割的函数

1、hsplit，水平方向分割。

通过指定返回相同shape的array的数量，或者分割应该发生之后的列来沿着其横轴拆分。

2、vsplit，沿着垂直轴分割。

3、split/array_split，自定义分割，axis=1 水平分割，axis=0 垂直方向分割。

实例

#4.分割-水平方向分割
h5=np.random.randint(0,100,size=(6,4))
h5
'''array([[13,7,29,65],
[57,50,79,12],
[9,16,82,86],
[97,62,43,92],
[66,21,78,34],
[95,33,51,63]])'''

np.hsplit(h5,2)#将h5水平分割等分两个数组，被分割的列一定为指定分割数的倍数
'''[array([[13,7],
[57,50],
[9,16],
[97,62],
[66,21],
[95,33]]),
array([[29,65],
[79,12],
[82,86],
[43,92],
[78,34],
[51,63]])]'''
np.hsplit(h5,[1,3])#将h5从下标为1、3的地方水平分割
'''[array([[13],
[57],
[9],
[97],
[66],
[95]]),
array([[7,29],
[50,79],
[16,82],
[62,43],
[21,78],
[33,51]]),
array([[65],
[12],
[86],
[92],
[34],
[63]])]
'''
#5分割-纵向分割
np.vsplit(h5,3)
'''
[array([[13,7,29,65],
[57,50,79,12]]),
array([[9,16,82,86],
[97,62,43,92]]),
array([[66,21,78,34],
[95,33,51,63]])]
'''
np.vsplit(h5,[1,2])
'''
[array([[13,7,29,65]]),
array([[57,50,79,12]]),
array([[9,16,82,86],
[97,62,43,92],
[66,21,78,34],
[95,33,51,63]])]
'''
#6分割-自定义分割
np.split(h5,2,axis=1)#横向分割，按列分割
'''
[array([[13,7],
[57,50],
[9,16],
[97,62],
[66,21],
[95,33]]),
array([[29,65],
[79,12],
[82,86],
[43,92],
[78,34],
[51,63]])]
'''
np.split(h5,3,axis=0)#纵向分割，按行分割
'''
[array([[13,7,29,65],
[57,50,79,12]]),
array([[9,16,82,86],
[97,62,43,92]]),
array([[66,21,78,34],
[95,33,51,63]])]
'''