# How to obtain surfaces below the 3d plots

4 views (last 30 days)
Sanoop Siby on 3 Mar 2020
Edited: Sanoop Siby on 10 Mar 2020
Hi Everyone,
Here you can see that i have a made a serios of 2d plots in 3d space to show the variation of stress along cross section.
How can i make a surface below each curve ##### 2 CommentsShow 1 older commentHide 1 older comment
Sanoop Siby on 3 Mar 2020
How can i maintain the surface inside the surface

Anmol Dhiman on 6 Mar 2020
Hi Sanoop,
You can create surface plots using surf(link). The above problem can be solved using different colors for each plot.
You can refer to link for having different colors.
Thanks
Sanoop Siby on 10 Mar 2020
Edited: Sanoop Siby on 10 Mar 2020
figure
hold on
j=5
for i = 11:2:12
XLoc = HMatrix(:,i) % first column in excel data
YStress = HMatrix(:,i+1) % second column in excel data
ZHigh = zeros(size(HMatrix(:,i)))+AxzH(j) % j is just a scalar number for heights
x=[XLoc;flip(XLoc)] % plot points on graph with axis (x,y)
y=[YStress ; flip(zeros(size(YStress)))] % plot points (x,0)
z =[ZHigh;flip(ZHigh)] % heights
[X,Y] = meshgrid(0:2:160,0:0.1:16)
IN =inpolygon(X,Y,x,y) % Create polygon with ploted points
X(~IN)=[]; % remove points mesh grid points outside polygon from X
Y(~IN) = []; % remove points mesh grid points outside polygon from Y
Z = zeros(size(X))+AxzH(j) % create appropriate Z values hieghts
X = reshape(X,[7,263]) % just a trial to make Z a matrix
Y = reshape(Y,[7,263]) % just a trial to make Z a matrix
Z = reshape(Z,[7,263]) % just a trial to make Z a matrix
disp(size(X))
disp(size(Y))
disp(size(Z))
sur = surface(X,Y,Z) % this works only if Z is a matrix
% T = delaunay(X,Y);
% trisurf(T,X,Y,Z) % also tried Trisurf but error points are collinear
pH= plot3(XLoc, YStress,ZHigh);
pH.LineWidth = 2;
plot3(X,Y,Z,'o') % gives perfect results
end
title('Shear-Stress distribution along width of beam section')
xlabel(' Distance along width of beam')
ylabel('Stress values')
zlabel('Depth of beam')
ax.XAxisLocation = 'origin';
ax.YAxisLocation = 'origin';
ax.ZAxisLocation = 'origin';
view(3)
grid on
hold off Hi Anmol thanks for the reply. But my problem is a bit different.
I have created these graps using a for loop.
My query is very similar to this
I have X and Y vectors. I want to have a surface. Surf requires Z to be a matrix. If i use gridata Z will still be a vector. If i use Tri surf Then it gives points are collinear.
Is there any way to tackle ths problem and create surface.
Thanks,
Sanoop Siby