Python中的 Matplotlib.axes.Axes.get_ybound()

Matplotlib是Python中的一个库，它是 NumPy 库的数值数学扩展。 Axes 类包含大部分图形元素：Axis、Tick、Line2D、Text、Polygon 等，并设置坐标系。 Axes 的实例通过回调属性支持回调。

matplotlib.axes.Axes.get_ybound()函数

matplotlib库的axes模块中的Axes.get_ybound()函数用于按递增顺序返回y轴的上下数值边界

Syntax: Axes.get_ybound(self)

Parameters: This method does not accepts any parameters.

Returns:This method returns the following

lower, upper :This returns the current lower and upper y-axis bounds.

编程需要懂一点英语

注意：此函数可以在各种情况下代替 get_ylim 使用。

下面的示例说明了 matplotlib.axes 中的 matplotlib.axes.Axes.get_ybound()函数：

示例 1：

# Implementation of matplotlib function
import numpy as np
import matplotlib.pyplot as plt
     
fig, (ax, ax1) = plt.subplots(1, 2)
t = 3*(np.random.rand(2, 100) - .5)
x = np.cos(2 * np.pi * t)
y = np.sin(2 * np.pi * t)
    
ax.plot(x, y, 'g')
lower, upper = ax.get_ybound()
ax.set_title('Original Window',
             fontsize = 10, fontweight ='bold')
    
ax1.plot(x, y, 'g')
ax1.set_ybound(1.5 * lower, 0.5 * upper)
ax1.set_title('Using get_ybound() function',
             fontsize = 10, fontweight ='bold')
fig.suptitle('matplotlib.axes.Axes.get_ybound() Example\n',
             fontsize = 14, fontweight ='bold')
plt.show()

输出：

示例 2：

import numpy as np
import matplotlib.pyplot as plt
    
# Fixing random state for reproducibility
np.random.seed(19680801)
    
# the random data
x = np.random.randn(1000)
y = np.random.randn(1000)
    
# definitions for the axes
left, width = 0.1, 0.65
bottom, height = 0.1, 0.65
spacing = 0.005
    
    
rect_scatter = [left, bottom, width, height]
rect_histx = [left, 
              bottom + height + spacing, 
              width, 0.2]
  
rect_histy = [left + width + spacing, 
              bottom, 0.2, height]
    
# start with a rectangular Figure
plt.figure()
    
ax_scatter = plt.axes(rect_scatter)
ax_scatter.tick_params(direction ='in',
                       bottom = True, 
                       right = True)
  
ax_histx = plt.axes(rect_histx)
ax_histx.tick_params(direction ='in', 
                     labeltop = True)
  
ax_histy = plt.axes(rect_histy)
ax_histy.tick_params(direction ='in', 
                     labelleft = True)
    
# the scatter plot:
ax_scatter.scatter(2 * x, y * 2, color ="green")
    
# now determine nice limits by hand:
binwidth = 0.05
lim = np.ceil(np.abs([x, y]).max() / binwidth) * binwidth
ax_scatter.set_xbound((-0.5 * lim, 0.5 * lim))
ax_scatter.set_ybound((-0.25 * lim, 0.25 * lim))
    
bins = np.arange(-lim, lim + binwidth, binwidth)
ax_histx.hist(x, bins = bins,
              color ="green")
  
ax_histy.hist(y, bins = bins, 
              color ="green",
              orientation ='horizontal')
    
ax_histx.set_xbound(ax_scatter.get_xbound())
ax_histy.set_ybound(ax_scatter.get_ybound())
    
plt.show()

输出：