User defined surface grid
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Lars
le 27 Nov 2013
Modifié(e) : Hannes Eschmann
le 28 Nov 2019
Hallo.
I am currently having troubles with defining a grid on the surface of my 3D plot (created by using mesh-function to plot with).
Would like to have something in between what's seen on the pictures below.
Wish to create following grid:
- Horizontal lines (parallel with x-axis) for z = (0:1:10)
- Vertical lines (parallel with z-axis) for x = (-10:2:10).
My code:
[X,Y] = meshgrid(-8:.1:8);
R = sqrt(X.^2 + Y.^2) + eps;
Z = sin(R)./R;
surf(X,Z,Y,Z)
set(gca,'YDir','Reverse','ZDir','Reverse')
colorbar; ylabel('y'); xlabel('x'); zlabel('z') ;
shading interp % To create right picture
What is the Matlab command for creating a surface grid as i wish?
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Jeremy Wurbs
le 28 Nov 2013
Ahh, I see. That is trickier. I get slightly better results by changing
mesh(XX,ZZ,YY,ZZ);
to
surf(XX,ZZ,YY,ZZ,'FaceAlpha',0)
although some of the edges are hidden still. If you're willing to cheat a little you can stick the edges out a tad bit:
surf(XX,ZZ+0.03,YY,ZZ,'FaceAlpha',0)
which seems to produce decent results.
Plus de réponses (2)
Jeremy Wurbs
le 27 Nov 2013
Modifié(e) : Jeremy Wurbs
le 27 Nov 2013
Great question. If I'm understanding correctly, you don't like the lines connecting your points to be so prevalent. You can fix this in your surf line:
surf(X,Z,Y,Z, 'EdgeAlpha', alpha)
Where alpha is some value between 0 and 1 (0.2 is probably good).
Hope that helps and is what you were looking for. Cheers.
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Lars
le 28 Nov 2013
1 commentaire
Hannes Eschmann
le 28 Nov 2019
Modifié(e) : Hannes Eschmann
le 28 Nov 2019
an excessive way of archiving a smooth coarse grid, would be to just create it yourself, e.g., via
smoothMesh(X,Y,Z,10,'k',1,1)
where
function smoothMesh(X,Y,Z,delta,color,alp,w)
hold on
for i = 1:delta:size(X,1)
p = plot3(X(i,:),Y(i,:),Z(i,:),color,'LineWidth',w);
p.Color(4) = alp;
end
p = plot3(X(end,:),Y(end,:),Z(end,:),color,'LineWidth',w);
p.Color(4) = alp;
for i = 1:delta:size(X,2)
p = plot3(X(:,i),Y(:,i),Z(:,i),color,'LineWidth',w);
p.Color(4) = alp;
end
p = plot3(X(:,end),Y(:,end),Z(:,end),color,'LineWidth',w);
p.Color(4) = alp;
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