| """ |
| =========== |
| Zoom Window |
| =========== |
| |
| This example shows how to connect events in one window, for example, a mouse |
| press, to another figure window. |
| |
| If you click on a point in the first window, the z and y limits of the second |
| will be adjusted so that the center of the zoom in the second window will be |
| the (x, y) coordinates of the clicked point. |
| |
| Note the diameter of the circles in the scatter are defined in points**2, so |
| their size is independent of the zoom. |
| |
| .. note:: |
| This example exercises the interactive capabilities of Matplotlib, and this |
| will not appear in the static documentation. Please run this code on your |
| machine to see the interactivity. |
| |
| You can copy and paste individual parts, or download the entire example |
| using the link at the bottom of the page. |
| """ |
|
|
| import matplotlib.pyplot as plt |
| import numpy as np |
|
|
| |
| np.random.seed(19680801) |
|
|
| figsrc, axsrc = plt.subplots(figsize=(3.7, 3.7)) |
| figzoom, axzoom = plt.subplots(figsize=(3.7, 3.7)) |
| axsrc.set(xlim=(0, 1), ylim=(0, 1), autoscale_on=False, |
| title='Click to zoom') |
| axzoom.set(xlim=(0.45, 0.55), ylim=(0.4, 0.6), autoscale_on=False, |
| title='Zoom window') |
|
|
| x, y, s, c = np.random.rand(4, 200) |
| s *= 200 |
|
|
| axsrc.scatter(x, y, s, c) |
| axzoom.scatter(x, y, s, c) |
|
|
|
|
| def on_press(event): |
| if event.button != 1: |
| return |
| x, y = event.xdata, event.ydata |
| axzoom.set_xlim(x - 0.1, x + 0.1) |
| axzoom.set_ylim(y - 0.1, y + 0.1) |
| figzoom.canvas.draw() |
|
|
| figsrc.canvas.mpl_connect('button_press_event', on_press) |
| plt.show() |
|
|
