Line Plots of 3-D Data
The 3-D analog of the plot function is plot3. If x, y, and z are three vectors of the same length,
plot3(x,y,z)
generates a line in 3-D through the points whose coordinates are the elements of x, y, and z and then produces a 2-D projection of that line on the screen. For example, these statements produce a helix.
t = 0:pi/50:10*pi;
plot3(sin(t),cos(t),t)
axis square; grid on
Plotting Matrix Data
If the arguments to plot3 are matrices of the same size, MATLAB plots lines obtained from the columns of X, Y, and Z. For example,
[X,Y] = meshgrid([-2:0.1:2]);
Z = X.*exp(-X.^2-Y.^2);
plot3(X,Y,Z)
grid on
Notice how MATLAB cycles through line colors.
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