Python plt.close() 和 plt.clf() 的区别
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Difference between plt.close() and plt.clf()
提问by Joseph Clifford
In Python, what is the difference between plt.clf()and plt.close()?
在 Python 中，plt.clf()和之间有什么区别plt.close()？
Will they function the same way?
他们会以同样的方式运作吗？
采纳答案by wim
plt.close()will close the figure window entirely, where plt.clf()will just clear the figure - you can still paint another plot onto it.
plt.close()将完全关闭图形窗口，在这里plt.clf()只会清除图形 - 您仍然可以在其上绘制另一个图。
It sounds like, for your needs, you should be preferring plt.clf(), or better yet keep a handle on the line objects themselves (they are returned in lists by plotcalls) and use .set_dataon those in subsequent iterations.
听起来，根据您的需要，您应该更喜欢plt.clf()，或者更好地保留行对象本身的句柄（它们通过plot调用在列表中返回）并.set_data在后续迭代中用于那些对象。
回答by Biplob45
plt.clf()clears the entire current figure with all its axes, but leaves the window opened, such that it may be reused for other plots.
plt.clf()清除整个当前图形及其所有轴，但保持窗口打开，以便它可以重新用于其他绘图。
plt.close()closes a window, which will be the current window, if not specified otherwise.
plt.close()关闭一个窗口，如果没有另外指定，它将是当前窗口。
回答by murnko
I think it is worth mentioning that plt.close()releases the memory, thus is preferred when generating and saving many figures in one run.
我认为值得一提的是plt.close()释放内存，因此在一次运行中生成和保存多个数字时首选。
Using plt.clf()in such case will produce a warning after 20 plots (even if they are not going to be shown by plt.show()):
plt.clf()在这种情况下使用将在 20 个图后产生警告（即使它们不会被 显示plt.show()）：
More than 20 figures have been opened. Figures created through the pyplot interface (
matplotlib.pyplot.figure) are retained until explicitly closed and may consume too much memory.
已经打开了20多个数字。通过 pyplot 接口 (
matplotlib.pyplot.figure)创建的图会保留直到明确关闭，并且可能会消耗太多内存。
回答by addy
There is a slight difference between the two functions.
这两个功能之间有细微的差别。
plt.close()- It altogether plots the graph in seperate windows,releasing memory,retaining each window for view.
plt.close()- 它在单独的窗口中一起绘制图形，释放内存，保留每个窗口以供查看。
plt.clf()- We can say,it displays the graph in the same window one after other
plt.clf()- 我们可以说，它在同一个窗口中一个接一个地显示图形
For illustration, I have plotted two graphs with paramters year and views on X axis and Y axis each. Initially I have used closed function.it displayed the graphs in two seperate windows…
为了说明，我绘制了两个图形，每个图形都带有参数 year 和 X 轴和 Y 轴上的视图。最初我使用的是封闭函数。它在两个单独的窗口中显示图形......
Afterwords, when I run the program with clf() it clears the graph and displays next one in same window i.e figure 1. Here is the code snippet -
后记，当我使用 clf() 运行程序时，它会清除图形并在同一窗口中显示下一个图形，即图 1。这是代码片段 -
import matplotlib.pyplot as plt
year = [2001,2002,2003,2004]
Views= [12000,14000,16000,18000]
Views2 = [15000,1800,24000,84000]
plt.plot(year,Views)
plt.show()
plt.clf()
plt.plot(year,Views2)
plt.show()
plt.clf()
