Python 如何将 Pandas 饼图保存到文件中？
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How to save Pandas pie plot to a file?
提问by neversaint
I have the following code:
我有以下代码：
import pandas as pd
import matplotlib
matplotlib.style.use('ggplot')
df = pd.DataFrame({ 'sample1':['foo','bar','bar','qux'], 'score':[5,9,1,7]})
sum_df = df.groupby("sample1").sum()
pie = sum_df.plot(kind="pie", figsize=(6,6), legend = False, use_index=False, subplots=True, colormap="Pastel1")
Which makes the pie chart. What I want to do then is to save it to a file. But why this fail?
这使得饼图。我想做的是将它保存到一个文件中。但是为什么会失败呢？
fig = pie.get_figure()
fig.savefig("~/Desktop/myplot.pdf")
I get this error:
我收到此错误：
'numpy.ndarray' object has no attribute 'get_figure'
采纳答案by styvane
Well pieis a numpy array because the return type for DataFrame.plot()is a numpy array of matplotlib.AxesSubplotobjects.
Wellpie是一个 numpy 数组，因为 for 的返回类型DataFrame.plot()是一个 numpymatplotlib.AxesSubplot对象数组。
fig = pie[0].get_figure()
fig.savefig("~/Desktop/myplot.pdf")
回答by kxxoling
Claim: My solution is save the current plot which works here, but it's not a good way to do this. What @user3100115 posted is the right way to do this.
声明：我的解决方案是保存在此处有效的当前绘图，但这不是执行此操作的好方法。@user3100115 发布的是正确的方法。
Using matplotlib.pyplot.savefigto save it:
使用matplotlib.pyplot.savefig来保存它：
import matplotlib.pyplot as plt
plt.savefig('pie')
You'll get a image named pie.png like this:
你会得到一个名为 pie.png 的图像，如下所示：
回答by Akash Nayak
Use this code:
使用此代码：
plt.get.savefig('myplot') #figure will be saved as saved_figure.png
plt.get.savefig('myplot.pdf') #figure will be saved as saved_figure.pdf
but make sure import shoul be like below code:
但确保导入应该像下面的代码：
import matplotlib.pyplot as plt
