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- What distance is saved when I click "save clusters" in the K-means clustering re...

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Feb 22, 2016 11:30 AM
(1704 views)

I am wondering what distance is saved for each row when I click "save clusters" in the Kmeans clustering report. I used the K-means method to participate my data table of 10000 rows into 50 clusters. When I clicked "save clusters", I saved two columns. One is the cluster column, which indicate which cluster the row is assigned to; the other one is called "Distance". I am wondering what distance is the "Distance". I found that the distance between each row and the cluster center is much smaller than the "Distance".

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Feb 22, 2016 2:10 PM
(1586 views)

This is taken from the Multivariate Methods book available in JMP under Help==>Books==>Multivariate Methods

Jim

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Feb 23, 2016 11:14 AM
(1586 views)

Thanks, Jim. It looks like that the distance is calculated as the Euclidean length between two vectors. Then which two vectors are used to calculate the "Distance"? Is it the distance between each row and the center of the cluster of that row? Or is it the distance between each row and the mean of all rows? However, rrom my calculation, the "Distance" is larger than both cases.