Matplotlib savefig()在多个图形上保持保存同一图形 [英] Matplotlib savefig() over multiple graphs keeps saving the same graph

问题描述

因此，我有一个函数generategraph(file)，该函数可根据参数中的数据正确创建条形图，然后将其保存.这是保存它的部分.

So I have a function generategraph(file) which correctly creates a bar graph based on the data in the parameter and then saves it. Here is the part that saves it.

    plt.show()
    savefile = file.split('.txt')[0] + '.png'
    plt.savefig(savefile)

然后在主要方面，我将遍历一组文件，并在每个文件上调用generategraph.

then in main, I will go through a set of files and call generategraph on each one.

    for fil in files:
        generategraph(fil)

plt.show()为我提供了正确的图形(每次都不同的图形)，但是当我转到保存的图形时，它们都是同一图形(因此len(文件)个已保存图形的数量，但每个都是第一个文件的图形(如果有意义).我只是感到困惑，因为plt.show()正在做我希望plt.savefig做的事情.

plt.show() gives me the correct graphs (different graphs each time), but when I go to the saved figures they are all of the same graph (so len(files) number of saved figures but each one is the graph of the first file if that makes sense). I am just confused because plt.show() is doing what I want plt.savefig to do.

推荐答案

您正在使用状态机(pyplot)界面.别.

You're using the state-machine (pyplot) interface. Don't.

显式创建人物:

fig1, ax1 = pyplot.subplots()

直接对他们采取行动:

lines, = ax1.plot(data1, data2, ...)

然后分别保存并关闭它们:

Then save and close them individually:

fig1.savefig(filename, dpi=300)
pyplot.close(fig1)

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