What needs to be done so that outliers are not displayed in the point cloud?

Question

0.00/5 (No votes)

See more:

I have a point cloud data i am applying an algorithm for checking inliers and outliers. After the check while displaying i just want to display the inliers and the outliers should not be displayed in the point cloud.
I am using MATLAB to display point cloud. What value should be given to the outliers so that they will not be displayed in my point cloud.

What I have tried:

I tried giving the outliers as NAN.

Posted 6-Apr-16 2:28am

riivv

Updated 6-Apr-16 20:25pm

Add a Solution

Comments

W∴ Balboos, GHB 6-Apr-16 9:17am

Couldn't you recreate the data set with the outliers eliminated? I did that with XPS data (cosmic rays caused spikes). Points > 2 SD from the mean were dropped and then the point plotted.

(This was actually a 2D signal-averaging model: typically 100pts/pt for 'y', although this could be increased for weaker signals.

<br>

riivv 6-Apr-16 9:42am

I have a point cloud data displayed in matlab. I am using that point cloud data as an input to my C++ code in a matrix. after that I am checking in c++ for inliers and outliers and then I have to send to send the matrix of same size as my input matrix which consists in inliers and outliers and then the outliers should be given some value so that while displaying them in matlab they will not be visible. I am not understanding what value to be given to outliers so that they will not be displayed

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

leon de boer · Accepted Answer · 2016-04-06T20:25:00

The NAN replacement should have worked so long as the MatLab commands are setup correctly. I assume you have checked the NAN replacement worked correctly.

The display or not display is totally controlled by the MatLab code and once you have the outliners as NAN you do what you like with them inside MatLab.

A basic 2D plot is usually something like
plot(a(~isnan(a)),b(~isnan(a)));

I am either missing something or you should be googling "MatLab How to avoid to plot the NAN value?"

Perhaps a start point
Using and removing NaN in MATLAB plots » Stuart’s MATLAB Videos[^]