Peaks of Matlab, mesh, and meshgrid Functions

Peaks of Matlab, mesh, and meshgrid Functions

Peaks:

MATLAB provides a peaks function to generate a concave and convex surface. It contains three local vertices and three Local Minimization points. The equation is:

I:

Peaks: 49*49 matrix (n = 49) by default)

II:

Z = peaks (N): The larger the value of N, the smaller the interval between neighboring points. Therefore, the smoother the line. The returned Z is a two-dimensional matrix.

For details, refer to the peaks function code: Open peaks

Mesh:

Draw a three-dimensional graph

I:

If () = 3, () = 4, () = 5, () = 6, soMesh (x) indicates to draw a 3D Graph with (row, column) as (x, y) and value as Z.Therefore, the four points in this example are:

(, 3), (, 4), (, 5), and (, 6)

II:

Mesh (x, y, z) indicates to draw a 3D Graph with (x, y, z)

Meshc:

Draw 3D mesh and contour map

Meshz:

Draw 3D grids and line charts

Meshgrid:

I:

[X, y] = meshgrid), Then ,. X is the same matrix for each row, and Y is the same matrix for each column.

II:

[X, y] = meshgrid), Then ,.

Example:

Z = peaks (30 );

Mesh (z );

Surf:

Use the following method to draw a 3D surface map:

I:

Surf (X)

II:

Surf (x, y, z)

Surfl:

Draw a 3D curved surface with shadow

Surfc:

Draw a 3D surface map with Contour Lines

Shading:

Shading flat
% Each area is represented in different colors.

Shading faceted% Deepen the gridline Based on shading flat

Shading interp% Shadow Smoothing

Colormap:

Set the color of a 3D image. The specific color can be:

Graph window --> edit --> colormap... --> Tools --> standerd colormaps select

For example:Colormap prism

Alphamap:

Set the transparency color of the image, specifically:

Alphamap ('Default');

Alphamap ('Rampup');
Alphamap ('Rampdown');
Alphamap ('Vup');
Alphamap ('Vdown');
Alphamap ('Increase');
Alphamap ('Decrease');
Alphamap ('Spin');

If you do not know a function, you can:

Doc xxx% Open the Help page of function xxx

Help xxx% Output the help information of function XXX directly in the Command window

When defining a function in MATLAB, you can useNarginIndicates the number of input parameters passed to the function.