擅长:python、mysql、java
<p><code>plot</code>有一个<code>color</code>参数。您可以为每列使用不同的颜色。例如</p>
<pre><code>import numpy as np
import matplotlib.pyplot as plt
import pandas as pd
n_columns = 4
df = pd.DataFrame(
np.random.randn(1000, n_columns),
columns=['col{}'.format(i) for i in range(n_columns)]
)
df.col0.plot(kind='hist', color='b')
df.col1.plot(kind='hist', color='c')
df.col2.plot(kind='hist', color='g')
df.col3.plot(kind='hist', color='k')
plt.legend()
</code></pre>