Python Matplotlib将图形另存为数据文件

问题描述

我想创建一个沿水平轴放大和缩小 matplotlib 图形的 python 脚本.我的图是一组水平条形图.

I want to create a python script that zooms in and out of matplotlib graphs along the horizontal axis. My plot is a set of horizontal bar graphs.

我也想使它能够拍摄任何通用的matplotlib图.

I also want to make that able to take any generic matplotlib graph.

我不想只加载图像并将其放大，我想沿水平轴放大图形.(我知道怎么做)

I do not want to just load an image and zoom into that, I want to zoom into the graph along the horizontal axis. (I know how to do this)

是否有某种方法可以将创建的图形保存和加载为数据文件，或者是否有可以稍后保存和加载的对象?

Is there some way I can save and load a created graph as a data file or is there an object I can save and load later?

(通常，我先创建图形，然后用matplotlib plt.show显示它，但是图形创建需要时间，并且我不想每次显示时都重新创建图形)

(typically, I would be creating my graph and then displaying it with the matplotlib plt.show, but the graph creation takes time and I do not want to recreate the graph every time I want to display it)

推荐答案

您可以使用 泡菜包，用于保存轴，然后将其加载回去.

You can use pickle package for saving your axes and then load it back.

将您的绘图保存到 pickle 文件中:

Save your plot into a pickle file:

import pickle
import matplotlib.pyplot as plt
ax = plt.plot([1,2,5,10])
pickle.dump(ax, open("plot.pickle", "wb"))

然后加载回来:

import pickle
import matplotlib.pyplot as plt
ax = pickle.load(open("plot.pickle", "rb"))
plt.show()

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