Python中的概率分布函数 [英] Probability distribution function in Python

问题描述

我知道如何在Python中创建直方图，但我想这是概率密度分布.

I know how to create an histogram in Python, but I would like that it is the probability density distribution.

让我们从我的例子开始.我有一个数组d，具有500000个元素.通过以下代码，我正在构建一个简单的直方图，告诉我每个仓之间有数组d的元素多少.

Let's start with my example. I have an array d, with a size of 500000 elements. With the following code I am building a simple histogram telling me how many elements of my array d are between every bin.

max_val=log10(max(d))
min_val=log10(min(d))

logspace = np.logspace(min_val, max_val, 50)
H=hist(select,bins=logspace,histtype='step')

问题在于这不是我想要的情节.我想拥有我的数组d的概率分布函数.与其让我的数组中每个bin中的元素数量不同，我不希望它们出现在该bin中.我尝试使用normed = True进行尝试，但是由于我的存储箱中的对数空间相同，因此似乎无法正常工作.

The problem is that this plot is not what I want. I would like to have the probability distribution function of my array d. Instead of having the number of elements of my array which are within every bins, I would like to have the probability of them being in that bin. I tried with normed=True, but that seems not working since I have bins which are equally logspaced.

推荐答案

目前尚不清楚您的hist函数是什么.如果您使用的是NumPy的histogram，请尝试设置density=True.参见 http://docs.scipy.org/doc/numpy/reference/generation/numpy.histogram.html .

It's not clear what your hist function is. If you're using NumPy's histogram, try setting density=True. See http://docs.scipy.org/doc/numpy/reference/generated/numpy.histogram.html .

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