Pandas DataFrame步骤图：where =＆＃34; post＆＃34;

Question

我想知道如何将matplotlibs where="post"传递给熊猫情节。

import numpy as np
import pandas as pd

df = pd.DataFrame(np.random.randn(36, 3))
df.plot(drawstyle="steps", linewidth=2)

# this doesn't work
df.plot(drawstyle="steps", where='post')

有谁知道如何实现这个目标？

提前致谢！

Answer 1

您只需指定drawstyle="steps-post"：

df = pd.DataFrame(np.random.randn(36, 3))
df.plot(drawstyle="steps", linewidth=2)
df.plot(drawstyle="steps-post", linewidth=2)

比较结果：

Answer 2

为什么不使用matplotlib图？ Click here for an example.

from matplotlib import pyplot as plt
plt.step(range(len(df.index)),df[0],where='post')
plt.step(range(len(df.index)),df[1],where='post')
plt.step(range(len(df.index)),df[2],where='post')