Hi,
Here is workflow using which surface smoothening can be achieved for data plotted with 'trisurf', using 'smoothn':
1) Interpolation onto a grid: The scattered data are first interpolated onto a regular grid, which allows 'smoothn' to be used
% Define a grid
[xq, yq] = meshgrid(linspace(min(x),max(x),100), linspace(min(y),max(y),100));
% Interpolate scattered data onto the grid
zq = griddata(x, y, z, xq, yq, 'natural');
2. Smoothing the Surface:
zq_smooth = smoothn(zq); % 'smoothn' is available from the File Exchange
3. Plotting the Smoothed Surface: The smoothed surface is plotted with 'surf', not 'trisurf', since the data are now on a grid.
surf(xq, yq, zq_smooth, 'EdgeColor', 'none');
view(3); axis tight;
I hope this helps!
