How to Plot 3D in MATLAB (2024)

  1. Use the mesh() Function to Create Surface Plots in MATLAB
  2. Use the scatter3() Function to Create a 3D Scatter Plot in MATLAB
  3. Use the contour3() Function to Create a 3D Contour Plot in MATLAB
  4. Use the plot3() Function to Create a 3D Plot of Point or Line in MATLAB
  5. Use the quiver3() Function to Create a 3D Quiver or Vector Plot in MATLAB
  6. Use the bar3() Function to Create a 3D Bar Graph in MATLAB
How to Plot 3D in MATLAB (1)

This tutorial will discuss creating 3d plots using the mesh(), scatter3(), contour3(), plot3(), quiver3(), and bar3() functions in MATLAB.

Use the mesh() Function to Create Surface Plots in MATLAB

Matlab’s built-in function mesh() creates the surface plots on a 3D plane. We can pass the matrix inside the mesh() function as a function that we want to plot in the 3D plane.

The mesh() function will plot the given matrix along the z-axis using the default value for the x-y coordinates. The x and y coordinates will be from the indices of the given matrix.

The given matrix will be plotted on the z-axis as heights on a three-dimensional plane.

For example, let’s create a matrix Z and plot it on the surface plot using the mesh() function in Matlab.

See the code below.

clc[x,y] = meshgrid(-18:1:18);r = sqrt(x.^2 + y.^2)/2;z = cos(r)./r;mesh(x,y,z)

Output:

How to Plot 3D in MATLAB (2)

Use the scatter3() Function to Create a 3D Scatter Plot in MATLAB

If we want to create a 3D scatter plot, we can use the scatter3() function. This function is the same as the scatter() function, though it plots the given data in a 3D plane.

We can give two or three input vectors to the scatter3() function.

In the case of three inputs, the first vector contains the x coordinates, the second contains the y coordinates, and the third contains the z coordinates.

In the case of two input vectors, the third coordinate z will be taken from the indices of the first two coordinates.

For example, let’s plot a scatter plot in a 3D place using the scatter3() function.

See the code below.

clcx = linspace(0,2*pi,100);y = sin(x) + rand(1,100);z = 1:100;scatter3(x,y,z)

Output:

How to Plot 3D in MATLAB (3)

Check this link for more details about the scatter() function.

Use the contour3() Function to Create a 3D Contour Plot in MATLAB

We can use Matlab’s built-in function contour3() to create a 3D contour plot. A contour plot is a plot of isolines with different colors according to values.

The color given to the line depends on its value. The colder color corresponds to low values, and the hotter color corresponds to high values.

For example, let’s plot a 3D contour plot of a sphere using the sphere() and the contour3() function. See the code below.

clc[x,y,z] = sphere(100);contour3(x,y,z);

Output:

How to Plot 3D in MATLAB (4)

Use the plot3() Function to Create a 3D Plot of Point or Line in MATLAB

We already know about the plot() function in Matlab, which is used to plot data on a 2D plane. The plot3() function is similar to the plot() function.

The only difference is that the plot3() function plots data on a 3D plane. We can plot data as a line, aka a continuous plot, and as points, aka a discrete plot.

We have to pass three coordinates, x, y, and z, to plot the data on a 3D plane. For example, let’s plot a helix in 3D using the plot3() function.

See the code below.

clct = 0:pi/50:10*pi;sinet = sin(t);cost = cos(t);plot3(sinet,cost,t)

Output:

How to Plot 3D in MATLAB (5)

Check this link for more details about the plot3() function.

Use the quiver3() Function to Create a 3D Quiver or Vector Plot in MATLAB

Matlab’s built-in function quiver3() can be used to plot a 3D quiver or vector plot. A scalar consists of only magnitude, but a vector contains magnitude and direction.

We can create a 3D plot of scalar data using the plot3() function, but we cannot plot vector data using the plot3() function because the function will not plot the direction of the vector.

In the case of vector, we can use the quiver3() function, which will plot the magnitude and direction of the vector.

For example, let’s create a matrix and plot it on a 3D plane with direction. See the code below.

clcm = [1:10 ;10:-1:1;1:10];quiver3(m,m,m,m)

Output:

How to Plot 3D in MATLAB (6)

Check this link for more details about the quiver3() function.

Use the bar3() Function to Create a 3D Bar Graph in MATLAB

We can use Matlab’s built-in function bar3() to plot a bar graph in a 3D plane. We must pass the data’s input matrix, plotted as heights on the z-axis in a 3D plane.

The other two coordinates (x and y) will be taken from the indices of the given matrix. For example, let’s create a 3D bar graph from a given matrix.

See the code below.

clcm = [1:10 ;10:-1:1;1:10];bar3(m)

Output:

How to Plot 3D in MATLAB (7)

Check this link for more details about the bar3() function.

How to Plot 3D in MATLAB (2024)

FAQs

How to plot 3D model in MATLAB? ›

To plot a 3D surface from a data file in MATLAB, you will need to have the data file open in MATLAB. Once you have the data file available, you can use the plot3 command to plot the data. The plot3 command will create a 3D plot of the data. You can also use the surf command to create a 3D surface plot.

How to plot 3 variables in MATLAB? ›

Plot the x , y , and t table variables. Return the Line object as p . Notice that the axis labels match the variable names. p = plot3(tbl,"x","y","t");

How do I make my MATLAB plot better? ›

Direct link to this comment
  1. Increase the linewidth (2 or 3 is good).
  2. Add a grid.
  3. Add minor ticks to the axes.
  4. Plot as an area with solid line and semi-transparent fill.
  5. Set the axes limits appropriately.
  6. Add a legend.
  7. Change the font and fontsize to match the output size.
  8. Set the figure aspect ratio correctly.
Feb 27, 2016

How to plot a 3-D graph? ›

In order to plot 3D figures use matplotlib, we need to import the mplot3d toolkit, which adds the simple 3D plotting capabilities to matplotlib. Once we imported the mplot3d toolkit, we could create 3D axes and add data to the axes. Let's first create a 3D axes.

How to plot a 3-D graph in MATLAB using Excel data? ›

Please follow the following steps:
  1. Prepare Your Excel File: Ensure your Excel file is organized such that it represents a grid of Z values. ...
  2. Read Data from Excel File: Use the readmatrix function to read the data from the Excel file into MATLAB.
  3. Extract X, Y, and Z Data: ...
  4. Plot the Surface:
Jun 26, 2024

How to plot 3 variables in one plot? ›

A basic “color plot”" displays the values of three variables at a time using colored symbols, where the value of one variable determines the relative position of the symbol along the X-axis and the value of a second variable determines the relative position of the symbol along the Y-axis, and the value of the third ...

Can we have multiple 3D plots in MATLAB? ›

Explanation: The plot3() function is a pre-defined function in MATLAB. So, it will allow the use to generate multiple 3d plots. This is inherent to the system. 8.

How do you maximize a plot in MATLAB? ›

To maximize the figure, you can mimic the sequence of keys you would actually use:
  1. ALT - SPACE (as indicated here) to access the window menu; and then.
  2. X to maximize (this may vary in your system).
Mar 8, 2013

How to plot optimization in MATLAB? ›

Plot Optimization During Execution

Use the PlotFcn name-value argument of optimoptions to specify one or more plotting functions for the solver to call at each iteration. Pass a function handle, function name, or cell array of function handles or function names as the PlotFcn value.

How do I get high quality figures in MATLAB? ›

To get a high-resolution image from MATLAB, you may use the "copy figure" option. In your Matlab figure, go to the "Edit" option, select "Copy Figure", then paste it in MS word file using "crtl+v". If you want to use the figure in latex, then save the figure in the ". eps" format.

How to plot 3-D cylinder in MATLAB? ›

To draw the cylinder, pass X , Y , and Z to the surf or mesh function. [X,Y,Z] = cylinder( r ) returns the x-, y-, and z- coordinates of a cylinder with the specified profile curve, r , and 20 equally spaced points around its circumference.

How do you plot a 3-D dot in MATLAB? ›

Use scatter3() to create the 3D scatter plot and scale the colors based on a vector of mean values.
  1. % Create 100x3 matrix of [x,y,z] coordinates.
  2. xyz = randi(1000,100,3);
  3. % Create 100x1 vector of means.
  4. mu = rand(100,1).*5;
  5. % Create 3D scatter plot, colorcode the values based on mu values.
Feb 19, 2020

How to create a 3-D object in MATLAB? ›

In MATLAB, the patch function can be used to generate a 3D model by specifying the vertices and faces of the object. This function provides a convenient way to plot and visualize 3D objects in MATLAB. patch('Vertices', vertices, 'Faces', faces, 'FaceColor','red');

How to plot Simulink model in MATLAB? ›

From the Simulink Editor, right-click the logging badge for a signal, and select Properties to open the Instrumentation Properties for the signal. Then, click the graphic representation of the Line. From the Instrumentation Properties, you can also select subplots where you want to plot the signal.

How to import a 3D model into MATLAB? ›

Create a world object. Use the load function to import a 3D file. This example uses an STL file. If you do not create a viewport, then the point of view is set to 0, 0, 0, and you can use the keyboard shortcuts and mouse controls to navigate in the Simulation 3D Viewer window.

References

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