pandas 将索引显示为熊猫图的 xticks
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/50805666/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Showing index as xticks for pandas plot
提问by Nickpick
I have the following dataframe and am trying to plot it, so that it shows in the x-axis the index data from 8-19.
我有以下数据框并试图绘制它，以便它在 x 轴上显示 8-19 的索引数据。
If I do df.plot()no labels are shown at all. If I do df.plot(use_index=True), the behaviour is unchanged. Finally I tried df.plot(xticks=df.index)but I'm getting an error AttributeError: 'NoneType' object has no attribute 'seq'
如果我不显示df.plot()任何标签。如果我这样做df.plot(use_index=True)，行为将保持不变。最后我试过了，df.plot(xticks=df.index)但出现错误AttributeError: 'NoneType' object has no attribute 'seq'
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
null = np.nan
df = pd.DataFrame.from_dict({"today sensor 1": {"08": 22.9, "09": 22.7, "10": 22.8, "11": 23.6, "12": 24.1, "13": 24.9,
"14": 25.0, "15": 25.2, "16": 25.7, "17": 26.1, "18": 26.0, "19": 25.8},
"today sensor 2": {"08": 24.5, "09": 24.5, "10": 24.8, "11": 25.3, "12": 26.4, "13": 26.7,
"14": 27.1, "15": 27.6, "16": 28.0, "17": 28.0, "18": 28.2, "19": 28.0},
"yesterday sensor 1": {"08": null, "09": null, "10": null, "11": null, "12": null, "13": null,
"14": null, "15": null, "16": 23.0, "17": 23.6, "18": 23.5, "19": 23.5},
"yesterday sensor 2": {"08": null, "09": null, "10": null, "11": null, "12": null, "13": null,
"14": null, "15": null, "16": 24.8, "17": 24.9, "18": 24.9, "19": 24.8}})
# df.plot(use_index=True) # does not work
df.plot(xticks=df.index)
plt.show()
What is even more strange is that when I do this:
更奇怪的是，当我这样做时：
ax = df.plot(use_index=True, style=['bs-', 'go-', 'b:', 'g:'])
ax.set_xticklabels(df.index)
plt.show()
The xticks will show but they are wrong. Only numbers from 9-14 are snown and every other number only. I would expect 08-19 as xticks.
xticks 会显示，但它们是错误的。只有 9-14 的数字会下雪，并且每隔一个数字才会下雪。我希望 08-19 为 xticks。
Any suggestions are appreciated.
任何建议表示赞赏。
回答by rpanai
If you want to have string as xticks one possible solution is:
如果您想将字符串作为 xticks，一种可能的解决方案是：
df = df.reset_index()
df = df.rename(columns={"index":"hour"})
ax = df.plot(xticks=df.index)
ax.set_xticklabels(df["hour"]);
回答by L. K?rkk?inen
Until the bug in Pandas gets fixed, add this after df.plot(), no need for anything else:
在 Pandas 中的错误得到修复之前，在 df.plot() 之后添加这个，不需要其他任何东西：
plt.xticks(range(len(df.index)), df.index)
回答by mapsa
Pandas version 0.24 for Python 3.6 (Windows) fixed this problem for me.
适用于 Python 3.6 (Windows) 的 Pandas 0.24 版为我解决了这个问题。
