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Plotting Level Curves after function

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lateef
lateef on 24 Mar 2023
Commented: Star Strider on 25 Mar 2023
how do i plot level curves in matlab
such as c = 0, 0.5, 1, ..., 3.
i have already computed the code for the function
f (x, y) = (x2 + 3y2)e1x2 y2
over the domain 1 x 1, 1 y 1.

Answers (1)

Star Strider
Star Strider on 24 Mar 2023
Use the contour function.
You can use fcontour, however it will not be possible to export its results to plot with contour.
  5 Comments
lateef
lateef on 25 Mar 2023
ive attached my currrent code i want to add level curves too using fcountour the code gets an error message
Star Strider
Star Strider on 25 Mar 2023
If you want to use a function handle, my code changes to:
f = @(x,y) (x.^2 + 3*y.^2).*exp(1-x.^2-y.^2);
figure
fcontour(f, [-1 1 -1 1], 'LevelList',[0:0.5:3], 'Fill','on')
colormap(turbo)
colorbar
axis('equal')
That is the only change necessary. The 'Fill','on' is optional.
Your code would work with contour or contourf, although not with fcontour, since fcontour creates its own matrices and does not take them as arguments.
.

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