Numpy----np. meshgrid()

Learning goals ：

master np.meshgrid() The relevant grammar of

Implement traversal between elements , Generate corresponding coordinates , We can draw these coordinates into the coordinate system .

print("***********************")
import numpy as np
import matplotlib.pyplot as plt
x = np.array([0, 1, 3])
y = np.array([0, 1, 5])
X, Y = np.meshgrid(x, y)
print(X)
print("********************")
print(Y)
plt.plot(X, Y,
         color='red',  #  Set all points to red 
         marker='*',  #  The shape of a dot is a dot 
         linestyle='-.')  #  The linetype is empty , That is, there is no line connection between points 
plt.grid(True) # Generate table 
plt.show()
print("***********************")

Equivalent to the x Axis coordinates （0,1,3） There are y The value of the axis （0,1,5）, share 3*3=9 A little bit .

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