Matplotlib.axis.axis.get_ticklocs()

matplotlib库的Axis模块中的Axis.get_ticklocs()函数用于获取数据坐标中的tick位置数组。

语法:Axis.get_ticklocs(self, minor=False)

参数:该方法接受以下参数。

• minor: boolean值。如果True返回次要的ticklocs，否则返回主要的ticklocs。

返回值:该方法以数据坐标返回标记位置数组。

下面的例子演示了matplotlib.axis.axis.get_ticklocs()函数在matplotlib.axis中的作用:

示例1

# Implementation of matplotlib function 
from matplotlib.axis import Axis  
import numpy as np 
import matplotlib.pyplot as plt 
from matplotlib.patches import Polygon 
      
      
def func(x): 
    return (x - 4) * (x - 6) * (x - 5) + 100
      
      
a, b = 2, 9  # integral limits 
x = np.linspace(0, 10) 
y = func(x) 
      
fig, ax = plt.subplots() 
ax.plot(x, y, "k", linewidth = 2) 
ax.set_ylim(bottom = 0) 
      
# Make the shaded region 
ix = np.linspace(a, b) 
iy = func(ix) 
verts = [(a, 0), *zip(ix, iy), (b, 0)] 
    
poly = Polygon(verts, facecolor ='green', 
               edgecolor ='0.5', alpha = 0.4) 
ax.add_patch(poly) 
      
ax.text(0.5 * (a + b), 30,  
        r"\int_a ^ b f(x)\mathrm{d}x", 
        horizontalalignment ='center',  
        fontsize = 20) 
      
fig.text(0.9, 0.05, 'x') 
fig.text(0.1, 0.9, 'y') 
      
ax.spines['right'].set_visible(False) 
ax.spines['top'].set_visible(False) 
    
ax.set_xticks((a, b-a, b)) 
ax.set_xticklabels(('a', 'valx', 'b'))
  
fig.suptitle('Matplotlib.axis.Axis.get_ticklocs()\n\
Function Example', fontweight ="bold")  
ax.grid()
   
print("Value of get_ticklocs() :")
for i in ax.xaxis.get_ticklocs():
    print(i)
      
plt.show()

输出:

Value of get_ticklocs() :
2
7
9

示例2

# Implementation of matplotlib function 
from matplotlib.axis import Axis  
import numpy as np 
import matplotlib.pyplot as plt 
      
# Fixing random state for reproducibility 
np.random.seed(19680801) 
      
x = np.linspace(0, 2 * np.pi, 100) 
y = np.sin(x) 
y2 = y + 0.2 * np.random.normal(size = x.shape) 
      
fig, ax = plt.subplots() 
ax.plot(x, y) 
ax.plot(x, y2) 
     
ax.set_xticks([0, np.pi, 2 * np.pi]) 
ax.set_xticklabels(['0', r'\pi', r'2\pi'])
      
ax.spines['left'].set_bounds(-1, 1) 
ax.spines['right'].set_visible(False) 
ax.spines['top'].set_visible(False)
  
print("Value of get_ticklocs() :")
for i in ax.xaxis.get_ticklocs():
    print(i)
      
fig.suptitle('Matplotlib.axis.Axis.get_ticklocs()\n\
Function Example', fontweight ="bold")  
ax.grid()
      
plt.show()

输出:

Value of get_ticklocs() :
0.0
3.141592653589793
6.283185307179586