Python 停止 seaborn 将多个数字叠加在一起
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Stop seaborn plotting multiple figures on top of one another
提问by Alex
I'm starting to learn a bit of python (been using R) for data analysis. I'm trying to create two plots using seaborn, but it keeps saving the second on top of the first. How do I stop this behavior?
我开始学习一些用于数据分析的 Python（一直在使用 R）。我正在尝试使用创建两个图seaborn，但它一直将第二个保存在第一个之上。我如何停止这种行为？
import seaborn as sns
iris = sns.load_dataset('iris')
length_plot = sns.barplot(x='sepal_length', y='species', data=iris).get_figure()
length_plot.savefig('ex1.pdf')
width_plot = sns.barplot(x='sepal_width', y='species', data=iris).get_figure()
width_plot.savefig('ex2.pdf')
回答by Leb
You have to start a new figure in order to do that. There are multiple ways to do that, assuming you have matplotlib. Also get rid of get_figure()and you can use plt.savefig()from there.
你必须开始一个新的数字才能做到这一点。有多种方法可以做到这一点，假设您有matplotlib. 也摆脱，get_figure()你可以plt.savefig()从那里使用。
Method 1
方法一
Use plt.clf()
import seaborn as sns
import matplotlib.pyplot as plt
iris = sns.load_dataset('iris')
length_plot = sns.barplot(x='sepal_length', y='species', data=iris)
plt.savefig('ex1.pdf')
plt.clf()
width_plot = sns.barplot(x='sepal_width', y='species', data=iris)
plt.savefig('ex2.pdf')
Method 2
方法二
Call plt.figure()before each one
plt.figure()在每一个之前打电话
plt.figure()
length_plot = sns.barplot(x='sepal_length', y='species', data=iris)
plt.savefig('ex1.pdf')
plt.figure()
width_plot = sns.barplot(x='sepal_width', y='species', data=iris)
plt.savefig('ex2.pdf')
回答by MF.OX
I agree with a previous comment that importing matplotlib.pyplotis not the best software engineering practice as it exposes the underlying library. As I was creating and saving plots in a loop, then I needed to clear the figure and found out that this can now be easily done by importing seabornonly:
我同意之前的评论，导入matplotlib.pyplot不是最好的软件工程实践，因为它暴露了底层库。当我在循环中创建和保存绘图时，我需要清除图形并发现现在只需导入即可轻松完成seaborn：
import seaborn as sns
data = np.random.normal(size=100)
path = "/path/to/img/plot.png"
plot = sns.distplot(data)
plot.get_figure().savefig(path)
plot.get_figure().clf() # this clears the figure
# ... continue with next figure
回答by mwaskom
Create specific figures and plot onto them:
创建特定图形并在其上绘图：
import seaborn as sns
iris = sns.load_dataset('iris')
length_fig, length_ax = plt.subplots()
sns.barplot(x='sepal_length', y='species', data=iris, ax=length_ax)
length_fig.savefig('ex1.pdf')
width_fig, width_ax = plt.subplots()
sns.barplot(x='sepal_width', y='species', data=iris, ax=width_ax)
width_fig.savefig('ex2.pdf')
