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Thread: separate a population into groups using 3 sets of data at once

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    separate a population into groups using 3 sets of data at once




    Hi there,
    I'm working on a population for which I have done 3 chemical analyses that give the concentration of different products in their tissues. The results seem to show that there's a segregation of my samples into 3 or maybe 4 groups.

    an example of the 3 main categories simplified (the 4th potential would be in between #2 and #3:
    _______Chemical1__Chemical2__Chemical3
    Indiv #1____2_________15__________2
    Indiv #2____5_________6___________5
    Indiv #3___10_________2__________11
    (sorry for this horrible table)

    I would like to find a statistical test that would separate my samples into groups using the 3 concentration at once but I'm not sure on how to do so. I usually compare groups.. here, I would like to build groups..
    Any help here to find a statistical test/method would be greatly appreciated!
    Thanks!
    Last edited by guamfr; 06-10-2015 at 01:26 PM. Reason: table

  2. #2
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    Re: separate a population into groups using 3 sets of data at once

    hi,
    this looks like a clustering question - the easiest would be to try k-means with 3 groups.

    regards

  3. #3
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    Re: separate a population into groups using 3 sets of data at once


    Thanks Rrogojel, I'll look into that..

    G

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