I can't randomly distribute the dots

Hi everyone, I need to randomly distribute z points on a project I'm working on, but when I multiply 'rand' and 'height points', 'rand' is just one number and it's just multiplying the elevation points by that number. The resulting image is like this

%% Dosyaları oku (*.las)
clc;clear
[FileName, PathName]=uigetfile('*.*','select point file');
lasReader = lasFileReader(FileName);
ptCloud = readPointCloud(lasReader);
figure;
pcshow(ptCloud.Location);
%% Z ekseni noktalarını seç   % Select z-axis points
Elevation=double(ptCloud.Location(:,3)); 
Yikikz=rand.*Elevation;
yikilan=[ptCloud.Location(:,1),ptCloud.Location(:,2),Yikikz];
figure;
pcshow(yikilan);

[Adam Danz]

Yikikz=rand.*Elevation;

This is not randomly distributing the z-coordinates. This is adding noise to the coordinates.

My answer to your other question shows exactly how to randomly distribute, or permute, the z-coordinates.

https://www.mathworks.com/matlabcentral/answers/714283-how-can-i-change-elevation-data-in-point-cloud#answer_596338

Answer 1

[Alan Stevens]

Try using

Yikikz=rand(size(Elevation)).*Elevation;

[Ahmet Selim Arslan]

This is how it happened this time, I want you to be like the image of a building collapsed in an earthquake. Height points scatter all over the x and y axes

%% Z ekseni noktalarını seç   % Select z-axis points
Elevation=double(ptCloud.Location(:,3));
Yikikz=rand(size(Elevation)).*Elevation;
yikilan=[ptCloud.Location(:,1),ptCloud.Location(:,2),Yikikz];
figure;
pcshow(yikilan);

[Alan Stevens]

Try adding

view(2)

after

pcshow(yikilan);

if what you're after is to see the distribution from above.

Answer 2

[Adam Danz]

> I want you to be like the image of a building collapsed in an earthquake. Height points scatter all over the x and y axes

What you're describing is a 2D plot, collapsing along the z-axis.

Set all z-values to 0 and add noise to the X and Y points.

I suggest using normallly distributed noise (randn) if you expect the particles to fall directly downward plus some variation.