how to plot contour of 3D variable
36 views (last 30 days)
Show older comments
HI
I have issue with my data
I have salinity data with dimension (time,Lat,Lon) and I want to plot a filled 3-D contour
I want to plot salinity at specific
timestep 1:13
for example the size of variable
Lat=24*25;
Lon=24*25;
Salinty=744*24*25;
I am getting error becouse the X ,Y and Salinity had different size
I try for loop but it didn't worke
for i=1:12;
Sal(i,:,:)=Salinity(i,:,:);
figure
contourf(X,Y,Sal(i,:,:);
end
Can someone help?
0 Comments
Accepted Answer
Voss
on 18 Aug 2024 at 23:46
Edited: Voss
on 18 Aug 2024 at 23:47
Example data:
Salinity = rand(744,24,25);
[Lat,Lon] = ndgrid(1:24,1:25);
whos Lat Lon Salinity
If you want a sequence of filled contours:
tmp = permute(Salinity,[2 3 1]);
whos tmp
for ii = 1:3 % first 3 times only
figure
contourf(Lon,Lat,tmp(:,:,ii));
end
Your code didn't work because Sal(i,:,:) is of size 1-by-24-by-25 but contourf expected a matrix of size 24-by-25.
In my suggested code, permute rearranges the dimensions of Salinity to make tmp, which is of size 24-by-25-by-744, so that each tmp(:,:,ii) is a matrix of size 24-by-25.
2 Comments
More Answers (1)
Walter Roberson
on 17 Aug 2024 at 22:58
In order to do 3D contours, you need to call isosurface . You would call it several times, once for each contour level.
However, filling the 3D contours is a bit of a problem.
I have to ask whether filling the contours is really necessary, as opposed to just drawing their surfaces? Since their entire surface would be drawn, the only visual difference between surface-only and surface-and-fill would be the visual effect of transparency -- showing darker locations where the view happens to strike more of the volume. That kind of visual hint is not without merits, but is it worth the trouble?
0 Comments
See Also
Categories
Find more on Oceanography and Hydrology in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!