将-inf替换为零值

Question

我有一个数组:

x =  numpy.array([-inf, -inf, 37.49668579])

有没有办法将-inf值更改为0？

Answer 1

有:

from numpy import inf
x[x == -inf] = 0

Answer 2

使用isneginf http://docs.scipy.org/doc/numpy/reference/generated/numpy.isneginf.html#numpy.isneginf

x[numpy.isneginf(x)] = 0

Answer 3

也许使用起来更简单、更灵活numpy.nan_to_num：

numpy.nan_to_num(x, neginf=0) 

Out[1]: array([ 0.        ,  0.        , 37.49668579])