使用matplotlib画图自定义marker

from matplotlib 
import pyplot as pltimport numpy as np
'图片插入(普通)'
N = 100
x = np.linspace(0, 10, N)
y = np.sin(x)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.imshow(plt.imread('icon\\icon-test.png'), extent=(x[0],x[0]+1,y[0],y[0]+1))
ax.plot(x, y)
plt.show()

from matplotlib import pyplot as plt
from matplotlib.offsetbox import OffsetImage, AnnotationBbox
import numpy as np
'图片插入(大小不变)'
N = 100
x = np.linspace(0, 10, N)
y = np.sin(x)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(x, y)
img = plt.imread('icon\\icon-test.png')
im = OffsetImage(img, zoom=0.3)
ab = AnnotationBbox(im, (x[0],y[0]), xycoords='data', frameon=False)
ax.add_artist(ab)
plt.show()

from matplotlib import pyplot as plt
from matplotlib.path import Path
import numpy as np
'通过Path类自定义marker'
#定义旋转矩阵
def rot(verts, az):
    #顺时针旋转
    rad = az / 180 * np.pi
    verts = np.array(verts)
    rotMat = np.array([[np.cos(rad), -np.sin(rad)], [np.sin(rad), np.cos(rad)]])
    transVerts = verts.dot(rotMat)
    return transVerts
iconMat = np.array([[-1.414, 1.414],
			[0, 0],
			[2.828, 2.828],
			[0, 0],
			[-1.414, 1.414]])
class CustomMarker(Path):
    def __init__(self, icon, az):
         if icon == "icon": 
             verts = iconMat  
         vertices = rot(verts, az)  
         super().__init__(vertices)
N = 30
x = np.linspace(0, 10, N)
y = np.sin(x)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.scatter(x, y, marker=IconMarker("icon", 20), c="red", s=1000)
plt.show()