Pandas DataFrame 步骤图：where="post"
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Pandas DataFrame step plot: where="post"
提问by Cord Kaldemeyer
I am wondering how I can pass matplotlibs where="post"into a pandas plot.
我想知道如何将 matplotlibs where="post"传递到 Pandas 图中。
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')
Does anyone know how to realize this?
有谁知道如何实现这一点？
Thanks in advance!
提前致谢！
回答by CT Zhu
You just need to specify drawstyle="steps-post":
您只需要指定drawstyle="steps-post"：
df = pd.DataFrame(np.random.randn(36, 3))
df.plot(drawstyle="steps", linewidth=2)
df.plot(drawstyle="steps-post", linewidth=2)
Compare the result:
比较结果：
回答by Charlie Haley
Why not just use a matplotlib plot? Click here for an example.
为什么不直接使用 matplotlib 图？单击此处查看示例。
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')
