How can I make a contour plot?

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Roneau
Roneau 2022-11-11
编辑： Roneau 2022-11-12
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Walter Roberson
Walter Roberson 2022-11-12
Well you can certainly create a grid and contour() it. And you can plot(xopt(1), xopt(2), '*') to mark the location of the minima on the contour plot.
Drawing the boundaries of the nonlinear constraints could be more difficult, depending on what they are. You could, though, evaluate the nonlcon function at each grid location and figure out from the output whether each point is inside the boundary or not, and draw something appropriate on the contour plot.
Roneau
Roneau 2022-11-12
Thank you. I think I understand now.

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Walter Roberson
Walter Roberson 2022-11-11
[x, y] = meshgrid(-5:5, -5:5);
z = x.^2 + 10.*y.^2 - 3.*x.*y;
contour(x, y, z)
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Matt J
Matt J 2022-11-12
@Roneau, you should Accept-click the answer if it addresses your question.

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