Clear Filters
Clear Filters

How to plot isosurface of for a wide range of values

5 views (last 30 days)
I wish to plot isosurface of my data, But in a wide range of values. For example, MathWork has introduced the following example for one-value isosurface in its help:
[x,y,z,v] = flow;
p = patch(isosurface(x,y,z,v,-3));
isonormals(x,y,z,v,p)
p.FaceColor = 'red';
p.EdgeColor = 'none';
daspect([1 1 1])
view(3);
axis tight
camlight
lighting gouraud
The above example, will plot "flow" data if their "v" values is equal to -3.
What I want to do, is that I want to plot my data like "flow", which their "v" values are higher than -3, not exactly equal to -3.
  1 Comment
Paul
Paul on 28 Apr 2024
An isosurface is only defined for a one value. Do you want to show separate plots of different isosurfaces for set of distinct values? Or somehow display multiple isosurfaces for different values on one plot? Or ...?

Sign in to comment.

Answers (1)

Mathieu NOE
Mathieu NOE on 29 Apr 2024
as @Paul suggested, we can define several levels and display them on the same plot
just having some fun with colors and transparency to give an idea of the result
[x,y,z,v] = flow;
k = (-4:1:-1);
figure,
hold on
for i = 1:numel(k)
p = patch(isosurface(x,y,z,v,k(i)));
f = i/numel(k); % fraction number
isonormals(x,y,z,v,p)
p.FaceColor = [1 f 1-f];
p.EdgeColor = 'none';
p.FaceAlpha = f;
daspect([1 1 1])
view(3);
axis tight
camlight
lighting gouraud
end

Products


Release

R2018b

Community Treasure Hunt

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

Start Hunting!