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This article is to share with you what is the basic operation of matlab drawing. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

I. graphic retention

Hold on: turn on graphics retention

Hold off: turn off drawing retention

Hold: switch between two modes

First, generate a planar grid matrix

(1) it is generated by matrix operation, such as:

(2) using mesggrid function to generate

[Xmeny] = meshgrid (xpeny)

Where parameters x and y are vectors and X and Y, which store grid point coordinates, are matrices.

2. Ones function

The function of ones is to produce an all-1 matrix, and ones (N) is to produce an all-1 matrix of NxN.

3. Mesh function

It is used to draw 3D grids in the format of mesh (x ~ y ~ ~ z ~ c)

Where x and y are the grid coordinate matrix, z is the height matrix on the grid point, and c is used to specify the surface color at different heights.

When c is omitted, the default is cymz, that is, the color is proportional to the height.

Other forms of call

Mesh (ZBJ c)

Surf (ZBJ c)

When xrem y is omitted, the second dimension subscript of the z matrix is regarded as the x axis coordinate, and the first dimension subscript of the z matrix is regarded as the y axis coordinate.

4. Surf function

Used to draw three-dimensional graphs

Surf (xpencil ypencil c)

Where x and y are the grid coordinate matrix, z is the height matrix on the grid point, and c is used to specify the surface color at different heights.

When c is omitted, the default is cymz, that is, the color is proportional to the height.

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