automatically changing view bounds on resize matlotlib

Question

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

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.

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

Answer 1

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()