How to obtain surfaces below the 3d plots

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Sanoop Siby
Sanoop Siby 2020-3-3
编辑： Sanoop Siby 2020-3-10
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
Thanks in advance.

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回答（1 个）

Anmol Dhiman
Anmol Dhiman 2020-3-6
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
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Sanoop Siby
Sanoop Siby 2020-3-10
编辑：Sanoop Siby 2020-3-10
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
shading interp
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
https://www.mathworks.com/matlabcentral/answers/14002-3d-surface-plot-with-only-vectors
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

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