只是徘徊-如何在Matplotlib中获得子图(轴?)的大小?
如果我在https://matplotlib.org/3.1.1/api/axes_api.html中使用Ctrl-F“ size”-在上下文中只有一个匹配项:“ ...具有不同的标记大小和/或...”,因此它并不能真正说明我如何找到轴的尺寸。
说,我的代码与Interactively resize figure and toggle plot visibility in Matplotlib?
中的相同#!/usr/bin/env python3
import matplotlib
print("matplotlib.__version__ {}".format(matplotlib.__version__))
import matplotlib.pyplot as plt
import numpy as np
default_size_inch = (9, 6)
showThird = False
def onpress(event):
global fig, ax1, ax2, ax3, showThird
if event.key == 'x':
showThird = not showThird
if showThird:
fig.set_size_inches(default_size_inch[0]+3, default_size_inch[1], forward=True)
plt.subplots_adjust(right=0.85) # leave a bit of space on the right
ax3.set_visible(True)
ax3.set_axis_on()
else:
fig.set_size_inches(default_size_inch[0], default_size_inch[1], forward=True)
plt.subplots_adjust(right=0.9) # default
ax3.set_visible(False)
ax3.set_axis_off()
fig.canvas.draw()
def main():
global fig, ax1, ax2, ax3
xdata = np.arange(0, 101, 1) # 0 to 100, both included
ydata1 = np.sin(0.01*xdata*np.pi/2)
ydata2 = 10*np.sin(0.01*xdata*np.pi/4)
fig = plt.figure(figsize=default_size_inch, dpi=120)
ax1 = plt.subplot2grid((3,3), (0,0), colspan=2, rowspan=2)
ax2 = plt.subplot2grid((3,3), (2,0), colspan=2, sharex=ax1)
ax3 = plt.subplot2grid((3,3), (0,2), rowspan=3)
ax3.set_visible(False)
ax3.set_axis_off()
ax1.plot(xdata, ydata1, color="Red")
ax2.plot(xdata, ydata2, color="Khaki")
fig.canvas.mpl_connect('key_press_event', lambda event: onpress(event))
plt.show()
# ENTRY POINT
if __name__ == '__main__':
main()
如何找到由ax1和ax2轴表示的子图的大小?
答案 0 :(得分:0)
有关 bbox
如何工作的完整说明,请参阅 here。每个轴对象都适合一个边界框。您需要做的就是获取轴边界框的高度和宽度。
ax_h, ax_w = ax.bbox.height, ax.bbox.width
您可以使用 bbox.transformed
方法转换为图形坐标。例如:
ax_h = ax.bbox.transformed(fig.gca().transAxes).height