将NumPy数组内容写入Python中的文件 [英] Write NumPy array contents to a file in Python

问题描述

我有一个要写入文件的NumPy数组

I have a NumPy array that I'm trying to write to a file

outfile.write(str(myarray))

但是，我得到的东西看起来像这样:

But, I get something that looks like this:

[    4.275000000e01   2.345000000e01  3.2135000000e-02    ]

我的要求是:

1. 将数据写入数组(而不是数组大括号[])
2. 以一定数量的尾随小数位(例如6)写入数据

通常，#2 并不难，但是我不确定如何与#1 结合使用.

Normally, #2 would not be that hard, but I'm not sure how to handle it in conjunction with #1.

我也想将数组写成一行.像这样:

I also want to write the array on one line as a row. like this:

4.27500000  2.34500000  0.03213500000

推荐答案

savetxt 等效于:

In [631]: x=np.array([4.275000000e01,   2.345000000e01,  3.2135000000e-02])

In [632]: '%10.6f %10.6f %10.6f'%tuple(x)
Out[632]: ' 42.750000  23.450000   0.032135'

In [642]: outfile.write((' '.join(['%10.6f ']*x.size)+'\n\n') % tuple(x))
42.750000   23.450000    0.032135

它将一维数组变成一个元组，并将其传递给format语句，并为数组中的每个项目指定格式.

It turns your one-dimensional array into a tuple and passes it off to the format statement, with a format specification for each item in the array.

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