重载一个浮动到numpy的数组 [英] overloading a float to a numpy array

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问题描述

我有一个函数,处理一维数组numpy的,像这样的:

I have a function, processing a 1D numpy array, like this:

def f(arr):
    arr=asarray(arr)
    #process data as numpy array
    #...
    return arr

使用 asarray 我允许调用函数列表作为 F([4,5,6])。现在,我想过载的说法也为单精度浮点,这样我就可以使用 F(4)而不是的F([ 4])

With asarray I allow to call the function with a list as f([4,5,6]). Now, I would like to "overload" the argument also to a single float, so that I can use f(4) instead of f([4]).

这是一个标准的numpy的功能,因为你可以叫 np.sin 罪(阵列([4,5,6])) ,或作为罪([4,5,6])罪(4)为好。我想出了这个code,在简单情况下工作至少为:

This is a standard numpy feature, since you can call np.sin as sin(array([4,5,6])), or as sin([4,5,6]) or as sin(4) as well. I came up with this code, that works at least in simple cases:

def f(arr):
    arr=asarray(arr)
    if arr.shape is ():
        print 'arr is a single float/int/etc'
        arr = array([arr])
    #process data as numpy array
    #...
    return arr

时做此标准/正确的方式?

Is this the standard/correct way to do it?

推荐答案

我相信你正在寻找的 np.atleast_1d

I believe you are looking for np.atleast_1d.

>>> np.atleast_1d(5)
array([5])
>>> np.atleast_1d(np.arange(2))
array([0, 1])

这篇关于重载一个浮动到numpy的数组的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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