I can't randomly distribute the dots

Question

Ahmet Selim Arslan 2021-1-13

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/715738-i-can-t-randomly-distribute-the-dots

回答： Adam Danz 2021-1-13

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);

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Adam Danz 2021-1-13

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

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Answer 1

Alan Stevens 2021-1-13

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/715738-i-can-t-randomly-distribute-the-dots#answer_596963

在 MATLAB Online 中打开

Try using

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

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Ahmet Selim Arslan 2021-1-13

在 MATLAB Online 中打开

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);