擅长:python、mysql、java
<p>我认为发生的情况是,您的数据数组是由整数组成的,这会导致以下问题:</p>
<pre><code>>>> import numpy, scipy.stats
>>>
>>> data = numpy.random.randint(37231, 56661,size=10)
>>> xmin, xmax = min(data), max(data)
>>> x = numpy.linspace(xmin, xmax, 10)
>>>
>>> density = scipy.stats.gaussian_kde(data)
>>> density.dataset
array([[52605, 45451, 46029, 40379, 48885, 41262, 39248, 38247, 55987,
44019]])
>>> density(x)
array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
</code></pre>
<p>但如果我们使用浮点数:</p>
<pre><code>>>> density = scipy.stats.gaussian_kde(data*1.0)
>>> density.dataset
array([[ 52605., 45451., 46029., 40379., 48885., 41262., 39248.,
38247., 55987., 44019.]])
>>> density(x)
array([ 4.42201513e-05, 5.51130237e-05, 5.94470211e-05,
5.78485526e-05, 5.21379448e-05, 4.43176188e-05,
3.66725694e-05, 3.06297511e-05, 2.56191024e-05,
2.01305127e-05])
</code></pre>