在调整 matlotlib 大小时自动更改视图边界 [英] automatically changing view bounds on resize matlotlib

问题描述

是否可以设置绘图以使其在扩展时显示更多数据?

Is it possible to setup plot to show more data when expanded?

Matplotlib调整大小后会缩放比例.要显示特定区域，可以在轴上使用 set_xlim 等.我有一个类似 ecg 的图显示实时数据，它的 y 限制是预定义的，但是如果我扩展窗口或只有大显示器，我希望看到更多沿 x 的数据.

Matplotlib plots scale when resized. To show specific area one can use set_xlim and such on axes. I have an ecg-like plot showing realtime data, its y limits are predefined, but I want to see more data along x if I expand window or just have big monitor.

我在 pyside 应用程序中使用它，我可以在调整大小时更改 xlim，但我想要更干净和通用的解决方案.

Im using it in a pyside app and I could just change xlim on resize but I want more clean and generic solution.

推荐答案

一种方法是实现 resize_event 的处理程序.这是一个如何完成的简短示例.您可以根据需要对其进行修改:

One way to do this is to implement a handler for resize_event. Here is a short example how this might be done. You can modify it for your needs:

import numpy as np
import matplotlib.pyplot as plt

def onresize(event):
    width = event.width
    scale_factor = 100.
    data_range = width/scale_factor
    start, end = plt.xlim()
    new_end = start+data_range
    plt.xlim((start, new_end))

if __name__ == "__main__":

    fig = plt.figure()
    ax = fig.add_subplot(111)
    t = np.arange(100)
    y = np.random.rand(100)
    ax.plot(t,y)
    plt.xlim((0, 10))
    cid = fig.canvas.mpl_connect('resize_event', onresize)
    plt.show()

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