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How to identify outliers or short fluctuation signal data from an array of data? [message #86927]

Fri, 13 December 2013 08:06

atmospheric physics is currently offline

atmospheric physics
Messages: 121
Registered: June 2010

Senior Member

Hello All,

I have a large array of numbers, but some numbers are so distinct that they shall be considered as outliers. Can I do this with Box-Whisker plot parameters?

Thanks in advance...

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Re: How to identify outliers or short fluctuation signal data from an array of data? [message #86929 is a reply to message #86927]

Fri, 13 December 2013 08:17

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Madhavan Bomidi writes:

> I have a large array of numbers, but some numbers are so distinct that they shall be considered as outliers. Can I do this with Box-Whisker plot parameters?

You can certainly do it with the *methods* used to construct the box and
whisker plots. The code is transparent. :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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Re: How to identify outliers or short fluctuation signal data from an array of data? [message #86931 is a reply to message #86927]

Fri, 13 December 2013 14:46

Andy Sayer
Messages: 127
Registered: February 2009

Senior Member

The sort function might be useful for you (then the elements nearest the ends of the array will be the smallest and largest values). http://www.exelisvis.com/docs/SORT.htmlThe mean, median, and stddev functions may also be useful. It depends on what you want to classify as an outlier.

On Friday, December 13, 2013 11:06:19 AM UTC-5, Madhavan Bomidi wrote:
> Hello All,
>
>
>
> I have a large array of numbers, but some numbers are so distinct that they shall be considered as outliers. Can I do this with Box-Whisker plot parameters?
>
>
>
> Thanks in advance...

Report message to a moderator

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