MATLAB: How to plot function with conditions (3d)

3dMATLABplotting

Suppose I want to plot the function

%  f(x,y) = x.*y by saying:
[x,y] = meshgrid (-2:2:2);
z = x.*y;
surf(x,y,z)

But what if I want the x and y values also to fulfill the equation x + y <= 1 ?

Best Answer

You can replace the unwanted values with nan.

[x,y] = meshgrid (-2:2:2);
z = x.*y;
mask = x + y  <= 1;
z(~mask) = nan;
surf(x,y,z)

Related Solutions

MATLAB: How to Plot 3 variable into a Surface (3D)

clc; clear all ;
x = -4:1:4;             % The range of x values.
y = -4:1:4;             % The range of y values.
[X,Y] = meshgrid (x,y); % This generates the actual grid of x and y values.
% Generating the Z Data
Z=Y.^2+X.^2;            % The function we're plotting.
figure(1);              % Generating a new window to plot in.
surf(X,Y,Z)             % The surface plotting function.

MATLAB: Intersection mesh plot (3D)

Without more information, I can only provide hints. Here you go:

If the two surfaces can be thought of as mathematical functions instead of mesh data, then you can plot the 0 level contour of the difference. If you use small positive and negative contour values, you can probably plot where the functions are similar. Even if you just have scattered mesh data, use scatteredInterpolant with natural interpolation to form a function. If the data is gridded, then use griddedInterpolant. See the documentation on scatteredInterpolant and griddedInterpolant .
Take a look at the Volume visualization tools . Specifically, isosurface and slice .

If this answered your question, click "Accept Answer."

If you like the answer, click the vote button.

Best Answer

Related Solutions

MATLAB: How to Plot 3 variable into a Surface (3D)

MATLAB: Intersection mesh plot (3D)

Related Question