Intertia of cluster models

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Aslan
Aslan Dataiku DSS Core Designer, Registered Posts: 6 ✭✭✭

Hello,

In the cluster kmeans results inertia is not true.

For example:

- Kmeans model, k=8, intertia is 1.0e+6

- Kmeans model, k=9, intertia is 9.6e+5

I think inertia must decrease when k increase.

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Answers

  • HarizoR
    HarizoR Dataiker, Alpha Tester, Registered Posts: 138 Dataiker
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    Hi Aslan,

    You are correct, inertia usually decreases when the number of clusters k increases! And the results you show actually back up this claim, since:

    kinertia
    81e+6 = 1,000,000
    99.6e+5 = 960,000

    Hope this helps!

    Best,

    Harizo

  • Aslan
    Aslan Dataiku DSS Core Designer, Registered Posts: 6 ✭✭✭
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    Thanks HarizoR.

    it is my mistake

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