Combining two surface plots

52 views (last 30 days)
turjdlawef
turjdlawef on 30 Jul 2021
Commented: Walter Roberson on 30 Jul 2021
I'm trying to combine two surface plots in a single figure. The problem is that one of the two is plotted on the wrong axis. The reason is that:
surface1 = surf(x,y,z)
surface2 = surf(x,z,y)
This is due to the mathematical equations behind x,z and y. I can't change them, i.e. rearrange z in terms of y for surface2.
Is there a way to map the two to the correct axes?
  2 Comments
KSSV
KSSV on 30 Jul 2021
An example image will help to understand the problem.
turjdlawef
turjdlawef on 30 Jul 2021
Edited: Walter Roberson on 30 Jul 2021
Sure, here's a screenshot:
The green one is rotated wrongly; this is because the z variable is p in this case, whilst for the yellow it is a. When
i.e.
yellow = surf(x,p,a), green = surf(x,a,p)
It seems to me that I can't change the order in surf because that means rearranging the underlying equations, which I can't do in this case. When I combine the two in a single figure, a and p are inverted. It's difficult to see graphically but I'm sure that that's the problem ... just don't know how to fix it :( This instead is what the correct blue surface should be:

Sign in to comment.

Accepted Answer

Walter Roberson
Walter Roberson on 30 Jul 2021
You can
ax = gca;
yellow = surf(ax, x, p, a);
hold(ax, 'on')
M = [1 0 0 1; 0 0 1 0; 0 1 0 0; 0 0 0 0];
hg = hgtransform(ax, 'Matrix', M);
green = surf(hg, x, a, p);
hold(ax, 'off')
xlim(ax, 'auto'); ylim(ax, 'auto'); zlim(ax, 'auto');
  5 Comments
turjdlawef
turjdlawef on 30 Jul 2021
Is it because, after hg, I've recreated a?
a = meshgrid(linspace(0,1,10));
Walter Roberson
Walter Roberson on 30 Jul 2021
In order for green = surf(hg, x, a, p); to work, then:
  • if x is a vector, then length(x) == size(p,2) -- columns not rows
  • if x is an array, then size(x) == size(p)
  • if a is a vector, then length(a) == size(p,1) -- rows not columns
  • if a is an array, then size(a) == size(p)
It is not an error to use an array for x by a vector for a, or a vector for x but an array for a, or a vector for both or an array for both -- but they have to match the appropriate dimension of p.

Sign in to comment.

More Answers (0)

Products


Release

R2021a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!