擅长:python、mysql、java
<p>您应该定义不希望被视为NaN的值:</p>
<p><a href="https://matplotlib.org/examples/pylab_examples/nan_test.html" rel="nofollow noreferrer">https://matplotlib.org/examples/pylab_examples/nan_test.html</a></p>
<p>例如:</p>
<pre><code>df.index = df[0].astype('datetime64')
#defining df[0] as index
idx = pd.date_range(start = '1/1/2011', end = max(period2), freq='D')
#creating new index
df = df.reindex(idx)
#reindexing df - it preserves values from 'y'
plt.plot(df.index, df['y'])
#creating plot
</code></pre>