Matalab basic learning (1)

Matlab meshgrid Function

Meshgrid is used to generate grids from arrays a and B. The size of the generated grid matrix A and B is the same. It can also be higher-dimensional.

[A, B] = Meshgrid (a, B)
Generate the matrices a and B of size (B) Xsize (. These matrices represent the x and y coordinates of the entire rectangular area.

It is equivalent to adding a from a row to the size (B) Row, turning B into a column and then adding it to the size (a) column again. Therefore, the command is equivalent to: A = ones (size (B) * a; B = B '* ones (size ())

 

As shown in the following figure: matrix A consists of the vector x that copies m rows, and B is composed of the vector y that copies n columns.

> A = []

A =

1 2

> B = [3: 5]

B =

3 4 5

> [A, B] = meshgrid (a, B)

A =

1 2
1 2
1 2

B =

3 3
4
5 5

 

> [B, A] = meshgrid (B,)

B =

3 4 5
3 4 5

A =

1 1 1
2 2 2