Structure mesh: plot different regions with different colors

2017 9 27
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更新时间：2017 9 28
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Hi all,
I have a 2D mesh with different regions, like this:
I generated a mesh for this beam
Is there a way to highlight the 2 circles with different colors?
Many thanks!

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KSSV
KSSV 2017-9-27
Yes..it can be....how you have data? Attach the data here.
Xiaohan Du
Xiaohan Du 2017-9-28
Please see the .mat file for data. data.node is the nodal info, data.elem is connectivity, data.region1 is the coordinates for the left circular region, data.region2 is the coordinates for the right circular region. I'd like to use different color to denote these regions. Thank you!

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KSSV
KSSV 2017-9-28

0 个投票

load data.mat ;
tri = data.elem ;
coor = data.node ;
x = coor(:,1) ; y = coor(:,2) ; z = coor(:,3) ;
patch('faces',tri(:,2:4),'vertices',coor , ...
'facevertexcdata' , z, ...
'facecolor','interp', ...
'edgecolor','none') ;
hold on
c1 = data.region1 ;
c2 = data.region2 ;
patch(c1(:,1),c1(:,2),c1(:,3),'r')
patch(c2(:,1),c2(:,2),c2(:,3),'b')

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Xiaohan Du
Xiaohan Du 2017-9-28
Matlab gave me this figure (in the attachment) which does not seem correct?. I'd like to have edges of the mesh as well.
KSSV
KSSV 2017-9-28
Change the edgecolor option to the color you want.
patch('faces',tri(:,2:4),'vertices',coor , ...
'facevertexcdata' , z, ...
'facecolor','interp', ...
'edgecolor','k') ;
KSSV
KSSV 2017-9-28
Rotate the figure.....you can change it's orientation....
KSSV
KSSV 2017-9-28
编辑：KSSV 2017-9-28
tri = data.elem ;
coor = data.node ;
x = coor(:,1) ; y = coor(:,2) ; z = coor(:,3) ;
trisurf(tri(:,2:4),coor(:,2),coor(:,3),coor(:,3))
view(2) ;
c1 = data.region1 ;
c2 = data.region2 ;
ylim([-20 40])
patch(c1(:,2),c1(:,3),c1(:,3),'r')
patch(c2(:,2),c2(:,3),c2(:,3),'b')
It can be fine tuned to get all elements of circles and plot them in our own color....
Xiaohan Du
Xiaohan Du 2017-9-28
This is much better, thanks a lot for your help!

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