The following code is meant to plot the vectors (4,5,6), (-3,6,-3) and (1,2,3) directed from the origin. plot3([0 4], [0 5], [0 6], 'k^--',[0 -3], [0 6], [0 -3], 'b^--', [0 1],... xlabel('x'); ylabel('y'); zlabel('z');
To draw the sphere using the returned coordinates, use the surf or mesh functions. [X,Y,Z] = sphere( n ) returns the x-, y-, and z- coordinates of a sphere with a radius equal to 1 and n -by- n faces. The function returns the x-, y-, and z- coordinates as three (n+1) -by- (n+1) matrices.
Create 3-D Bar Graph from Vector Data
Specify z as a vector of five values. Plot these values as a series of 3-D bars, with the height of each bar corresponding to a value in z and its y-axis location corresponding to the index of that value. z = [50 40 30 20 10]; bar3(z);
Simulink 3D Animation™ links Simulink® models and MATLAB® algorithms to 3D graphics objects in virtual reality scenes. You can animate a virtual world by changing position, rotation, scale, and other object properties during desktop or real-time simulation.
view(az,el) and view([az,el]) set the viewing angle for a three-dimensional plot. The azimuth, az , is the horizontal rotation about the z-axis as measured in degrees from the negative y-axis. Positive values indicate counterclockwise rotation of the viewpoint. el is the vertical elevation of the viewpoint in degrees.
With MATLAB, you can use interactive apps or built-in functions to import your 3D image data from a variety of file formats such as TIFF, DICOM, or NIfTI. The DICOM Browser app allows you to explore collections of DICOM files.
zlabel( ax ,___) adds the label to the axes specified by ax . This syntax allows you to specify the axes to which to add a label. ax can precede any of the input argument combinations in the previous syntaxes. h = zlabel(___) returns the handle to the text object used as the z-axis label.
When visualized in three dimensions, the XYZ plot area takes the form of a cube with a horizontal x-axis representing values, a vertical y-axis representing values, and a depth z-axis representing values.
Three-dimensional Points and Lines
The most basic three-dimensional plot is a line or collection of scatter plot created from sets of (x, y, z) triples. In analogy with the more common two-dimensional plots discussed earlier, these can be created using the ax.plot3D and ax.scatter3D functions.
A bubble chart is similar to a scatter plot. However, a bubble chart displays three dimensions of data instead of two.
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.
To display image data, use the imshow function. The following example reads an image into the workspace and then displays the image in a figure window using the imshow function. You can also pass imshow the name of a file containing an image. imshow("moon.
Display Image of Matrix Data
Create matrix C . Display an image of the data in C . Add a colorbar to the graph to show the current colormap. By default, the CDataMapping property for the image is set to 'direct' so image interprets values in C as indices into the colormap.