如何在一个IPython笔记本中多次显示同一matplotlib图? [英] How do I show the same matplotlib figure several times in a single IPython notebook?

问题描述

我将IPython笔记本与matplotlib.pyplot一起使用，并且我经常创建一个需要大量代码来生成的绘图.然后，我想保存该对象，并使用完全相同的图形/轴对稍后合并到另一个绘图中.

I use IPython notebooks with matplotlib.pyplot and I often create a plot that requires a fairly large block of code to generate. I would then like to save the object and use that exact same figure/axes pair to incorporate in another plot later on.

例如，假设我有一些成对的x-y数据.我想先显示点，然后再显示几个单元格(可能还会调用pyplot来制作其他不相关的图形)，我想再次显示该图形，以便可以用回归线或某些图形在其上绘制其他图形.

For example, suppose I have some pairs of x-y data for a scatter plot. I'd like to show the points and then several cells later--potentially with other calls to pyplot to make other, unrelated figures--I would like to show that figure again so that I could plot over it with a regression line or some other graphics.

在下面所附的图片中，我有一个简短的笔记本；我希望将单元格2中的图形绘制到单元格3中，而无需再次调用pyplot.scatter.

In the picture I've attached below, I have a short notebook; I want the figure from cell #2 to be drawn in cell #3 without calling pyplot.scatter again.

本质上，我想再次显示该图而不重复所有代码.我有什么选择呢?我无法通过调用show()或draw()或将单元格中的当前图形对象设置为我保存的图形对象来完成此操作.任何建议都欢迎.谢谢！

Essentially, I want to show the figure again without repeating all the code. What are my options for doing this? I have been unable to accomplish this with calls to show() or draw() or by setting the current figure object in the cell to be my saved figure object. Any advice is welcome. Thanks!

P.S.我知道，如果我重用图形并在其上绘图，则对象将发生变化，因此，无花果对象的状态可能与在先前的IPython单元中绘制的图形不匹配.我的工作没关系.

P.S. I know that if I reuse the figure and plot over it, the object will change and so the state of the fig object may not match the plot that was drawn in a previous IPython cell. That's okay for my work.

示例IPython笔记本

推荐答案

在之前在单元格中分配了myFigure之后，只需在任何单元格中调用myFigure.

Just call myFigure in any cell after myFigure was assigned in cell before.

例如在单元格1中:

In [1]:
myFigure, myAx = plt.subplots()
myAx.plot([1,2,3])

之后在单元格中:

In [2]:
myFigure

这将显示myFigure

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