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Intertia of cluster models

Aslan
Level 2
Intertia of cluster models

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.

Capture.PNG

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2 Replies
HarizoR
Dataiker
Dataiker

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:

k inertia
8 1e+6 = 1,000,000
9 9.6e+5 = 960,000

 

Hope this helps!

Best,

Harizo

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Aslan
Level 2
Author

Thanks HarizoR.

it is my mistake

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