Python保存空图 [英] Python saving empty plot

问题描述

这个问题是重复的.原始问题的链接已发布在上方.

This question is a duplicate. Original question's link is posted above.

我正在使用Python绘制一组值，这些值在Python终端上显示良好(使用Jupyter NoteBook)，但是当我保存它时，打开时保存的文件显示空白(完全白色)的照片.这是我的代码:

I am using Python to plot a set of values which are showing good on the Python terminal (using Jupyter NoteBook) but when I save it, the saved file when opened shows an empty (completely white) photo. Here's my code:

import matplotlib.pyplot as plt
plt.plot([1,3,4])
plt.show()
plt.savefig('E:/1.png')

推荐答案

您应该在关闭绘图之前保存该绘图:实际上，plt.show()放置该绘图并阻塞执行，直到您关闭它为止.因此，当您尝试保存下一条指令时，该图已被破坏，无法保存.

You should save the plot before closing it: indeed, plt.show() dislays the plot, and blocks the execution until after you close it; hence when you attempt to save on the next instruction, the plot has been destroyed and can no longer be saved.

import matplotlib.pyplot as plt
plt.plot([1,3,4])
plt.savefig('E:/1.png')   # <-- save first
plt.show()                # <-- then display

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