numpy.ma.power

ma.power(a, b, third=None)

返回逐元素将基数组提升到第二个数组中的幂.

这是 numpy.power 的掩码数组版本.详细信息请参见 numpy.power.

参见

numpy.power

备注

numpy.power 的 out 参数不被支持,`third` 必须为 None.

示例

>>> import numpy as np
>>> import numpy.ma as ma
>>> x = [11.2, -3.973, 0.801, -1.41]
>>> mask = [0, 0, 0, 1]
>>> masked_x = ma.masked_array(x, mask)
>>> masked_x
masked_array(data=[11.2, -3.973, 0.801, --],
         mask=[False, False, False,  True],
   fill_value=1e+20)
>>> ma.power(masked_x, 2)
masked_array(data=[125.43999999999998, 15.784728999999999,
               0.6416010000000001, --],
         mask=[False, False, False,  True],
   fill_value=1e+20)
>>> y = [-0.5, 2, 0, 17]
>>> masked_y = ma.masked_array(y, mask)
>>> masked_y
masked_array(data=[-0.5, 2.0, 0.0, --],
         mask=[False, False, False,  True],
   fill_value=1e+20)
>>> ma.power(masked_x, masked_y)
masked_array(data=[0.2988071523335984, 15.784728999999999, 1.0, --],
         mask=[False, False, False,  True],
   fill_value=1e+20)