Python中的 Matplotlib.axes.Axes.get_ylim()
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_ylim()函数
matplotlib 库的 axes 模块中的Axes.get_ylim()函数用于获取 y 轴视图限制。
Syntax: Axes.get_ylim(self)
Returns:This method returns the following
- bottom, top :This returns the current y-axis limits in data coordinates.
下面的示例说明了 matplotlib.axes 中的 matplotlib.axes.Axes.get_ylim()函数:
示例 1:
# Implementation of matplotlib function
from matplotlib.widgets import Cursor
import numpy as np
import matplotlib.pyplot as plt
np.random.seed(19680801)
fig, (ax, ax1) = plt.subplots(1, 2,
facecolor ='#A0F0CC')
x, y = 4*(np.random.rand(2, 100) - .5)
ax.plot(x, y, 'g')
ax.set_ylim(-3, 3)
xmin, xmax = ax.get_ylim()
ax.set_title('Original Window',
fontsize = 10,
fontweight ='bold')
ax1.plot(x, y, 'g')
ax1.set_ylim(xmin, 2 * xmax)
ax1.set_title('Using get_ylim() function',
fontsize = 10,
fontweight ='bold')
fig.suptitle('matplotlib.axes.Axes.get_ylim(\
Example\n', fontsize = 10, fontweight ='bold')
plt.show()
输出:
示例 2:
# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
fig1, (ax1, ax11) = plt.subplots(1, 2)
fig2, (ax2, ax22) = plt.subplots(1, 2)
ax1.set(xlim =(-0.5, 1.5),
ylim =(-0.5, 1.5),
autoscale_on = False)
ax2.set(xlim =(0.5, 0.75),
ylim =(0.5, 0.75),
autoscale_on = False)
ax11.set(xlim =(-0.5, 1.5),
ylim =(-0.5, 1.5),
autoscale_on = False)
ax22.set(xlim =(0.5, 0.75),
ylim =(0.5, 0.75),
autoscale_on = False)
x, y, s, c = np.random.rand(4, 200)
s *= 200
ax1.scatter(x, y, s, c)
ax2.scatter(x, y, s, c)
ax11.scatter(x, y, s, c)
ax22.scatter(x, y, s, c)
def GFG(event):
if event.button != 1:
return
x, y = event.xdata, event.ydata
ax2.set_xlim(x - 0.1, x + 0.1)
ax2.set_ylim(y - 0.1, y + 0.1)
ax22.set_xlim(x - 0.1, x + 0.1)
ax22.set_ylim(y - 0.1, y + 0.1)
fig2.canvas.draw()
fig1.canvas.mpl_connect('button_press_event',
GFG)
xmin, xmax = ax1.get_ylim()
ax1.set_title('Original Window', fontsize = 10,
fontweight ='bold')
ax11.set_ylim(xmin, 2 * xmax)
ax11.set_title('After Using get_ylim() function',
fontsize = 10, fontweight ='bold')
xmin, xmax = ax2.get_ylim()
ax2.set_title('Zoomed Window', fontsize = 10,
fontweight ='bold')
ax22.set_ylim(xmin, 2 * xmax)
ax22.set_title('After Using get_ylim() function',
fontsize = 10, fontweight ='bold')
fig1.suptitle('matplotlib.axes.Axes.get_ylim()\
Example\n', fontsize = 10, fontweight ='bold')
plt.show()
输出: