擅长:python、mysql、java
<p>演示:</p>
<pre><code>In [64]: from sklearn.feature_extraction.text import CountVectorizer
In [65]: cv = CountVectorizer()
In [66]: X = cv.fit_transform(mesh)
In [67]: X.A
Out[67]:
array([[1, 1, 1, 0],
[1, 1, 0, 1]], dtype=int64)
</code></pre>
<p>列名:</p>
^{pr2}$
<p>我们可以用熊猫。Sparsetalaframe公司名称:</p>
<pre><code>In [135]: import pandas as pd
In [136]: pd.SparseDataFrame(X, columns=cv.get_feature_names(), default_fill_value=0)
Out[136]:
aligator cat dog mouse
0 1 1 1 0
1 1 1 0 1
</code></pre>