Matlab: Application details of meshgrid function in graphics?

1.meshgrid usage

x = 1:3;
y = 1:5;
[XR,YR] = meshgrid(x,y)
%-------%结果
XR = 5×3

     1     2     3
     1     2     3
     1     2     3
     1     2     3
     1     2     3

YR = 5×3

     1     1     1
     2     2     2
     3     3     3
     4     4     4
     5     5     5
%%
XR矩阵的每一行是x的副本，
YR矩阵的每一列是y的副本。
XR和YR的维度是length(y) * length(x)

2. Application of meshgrid in graphics

Use this function to generate grid points, and evaluate the coordinates of the grid points as independent variables.