Matlab F(x,y,z) Plotting
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Greetings,
I would like to plot a function i.e. f(x,y,z) = X.^4 - 2*X.^2 + Y.^2 + 2*Y*Z +2*Z.^2 for my backtracking optimization problem. I am able to plot the contour of f(x,y) questions with the code given below. But I couldn't even plot a contour such function. Any help would be appreciated.
xAxis = linspace(-1,2.5,1000);
yAxis = linspace(-1,2.5,1000);
zAxis = linspace(-1,2.5,1000);
[ X,Y ] = meshgrid(xAxis,yAxis);
Z = X.^2 + 5*Y.^2 ;
contour(X,Y,Z,30)
Best Regards,
Ömer
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Ameer Hamza
le 16 Mai 2020
Modifié(e) : Ameer Hamza
le 16 Mai 2020
You can use slice() to create a contour plot of your function at specified planes. Try this
xAxis = linspace(-1,2.5,100);
yAxis = linspace(-1,2.5,100);
zAxis = linspace(-1,2.5,100);
[X, Y, Z] = meshgrid(xAxis,yAxis,zAxis);
f = X.^4 - 2*X.^2 + Y.^2 + 2*Y.*Z +2*Z.^2;
x_planes = [1 2];
y_places = 0;
z_planes = [0.5 1];
slice(X, Y, Z, f, x_planes, y_places, z_planes);
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