[英]Python - Create a single horizontal stacked bar chart from Pandas data?
I'm looking to create a single horizontal stacked bar chart as an alternative to a pie chart to show percentages. 我希望创建一个水平堆积条形图,以替代饼图以显示百分比。
I'm pretty sure plot.barh will do the job (it creates multiple stacked bars in another piece of code I have). 我非常确定plot.barh会完成这项工作(它在我拥有的另一段代码中创建了多个堆叠的条形图)。 But here it doesn't stack the bars.
但是在这里,它不会堆积条形图。 How do I fix it?
我如何解决它?
import pandas as pd
import matplotlib.pyplot as plt
data=pd.DataFrame(data={"R1":["Yes","Yes","Yes","No","No"]})
freq = data["R1"].value_counts(normalize=True)*100
fig,ax = plt.subplots()
freq.plot.barh(ax=ax,stacked=True)
Stacking means putting several series of one dataframe on top of each other, so their values cumulate. 堆叠意味着将一个数据帧的多个序列彼此叠加,这样它们的值就会累加。
You have a single series only, with two values, which consequently are plotted in one bar series. 您只有一个序列,带有两个值,因此以一个条形图进行绘制。
You could make a DataFrame out of your series, transform it so that Yes
and No
are two columns with one value each and then plot it the way you tried: 您可以从系列中制作一个DataFrame,对其进行转换,使
Yes
和No
是两列,每列一个值,然后按照尝试的方式绘制它:
freq.to_frame().T.plot.barh(stacked=True)
to examine the difference: 检查差异:
freq
# Yes 60.0
# No 40.0
# Name: R1, dtype: float64
freq.to_frame().T
# Yes No
# R1 60.0 40.0
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