将ndarray从float64转换为整数 [英] Convert ndarray from float64 to integer

问题描述

我在python中有一个ndarray，其中dtype为float64.我想将数组转换为整数数组.我该怎么办?

I've got an ndarray in python with a dtype of float64. I'd like to convert the array to be an array of integers. How should I do this?

int()无效，因为它不能将其转换为标量.更改dtype字段本身显然不起作用，因为实际字节没有更改.我似乎在Google或文档中找不到任何内容-最好的方法是什么?

int() won't work, as it says it can't convert it to a scalar. Changing the dtype field itself obviously doesn't work, as the actual bytes haven't changed. I can't seem to find anything on Google or in the documentation - what's the best way to do this?

推荐答案

使用.astype.

>>> a = numpy.array([1, 2, 3, 4], dtype=numpy.float64)
>>> a
array([ 1.,  2.,  3.,  4.])
>>> a.astype(numpy.int64)
array([1, 2, 3, 4])

有关更多信息，请参见文档.选项.

See the documentation for more options.

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