# How to convert a point cloud to a 3-d surface

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KEDI YAN on 9 Jan 2020
Commented: KEDI YAN on 13 Jan 2020
I have three set of datas and their corresponding values. For example, the value of point [x1(1),y(1),z(1)] is S21_1(1) or [x3(2),y(2),z(2)] is S21_3(2)
l = 110;
x1 = [3,3,3,3,3,3,3,3];
x2 = [5,5,5,5,5,5,5,5];
x3 = [8,8,8,8,8,8,8,8];
y = [l*sind(0),l*sind(1),l*sind(2),l*sind(3),l*sind(4),l*sind(5),l*sind(6),l*sind(7)];
z = [l-l*cosd(0),l-l*cosd(1),l-l*cosd(2),l-l*cosd(3),l-l*cosd(4),l-l*cosd(5),l-l*cosd(6),l-l*cosd(7)];
S21_1 = [-12.829,-13.591,-16.019,-20.054,-21.29,-22.542,-26.333,-30.121];
S21_2 = [-14.76,-15.357,-16.146,-19.42,-22.873,-29.781,-37.933,-46.454];
S21_3 = [-16.12,-15.243,-21.417,-24.621,-25.024,-26.114,-28.044,-30.751];
Using the following code to generate a point cloud
ptCloud1 = pointCloud([x1(:),y(:),z(:)],'Intensity',S21_1(:));
ptCloud2 = pointCloud([x2(:),y(:),z(:)],'Intensity',S21_2(:));
ptCloud3 = pointCloud([x3(:),y(:),z(:)],'Intensity',S21_3(:));
pcshow(ptCloud1,'MarkerSize',1000)
hold on
pcshow(ptCloud2,'MarkerSize',1000)
hold on
pcshow(ptCloud3,'MarkerSize',1000)
hold off My question is how do I convert the point cloud plot to a 3-d surface while maintain the intensity of each point so that the surface will have a gradient color that indicate the intensity change.

Soham Chakraborty on 13 Jan 2020
Hi,
Hope this helps.
KEDI YAN on 13 Jan 2020
Thanks. I acually figured it out after posting the question. I also checked the link and it used the same function as I did. Thanks though!

R2019b

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