topic Re: which distance does JMP use in clustering? in Discussions
https://community.jmp.com/t5/Discussions/which-distance-does-JMP-use-in-clustering/m-p/275394#M53441
<P>Hi <LI-USER uid="1067"></LI-USER> ,</P>
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<P>JMP uses <A href="https://en.wikipedia.org/wiki/Euclidean_distance" target="_self">Euclidean Distance</A> for the initial distance matrix calculation between observations and then the method chosen for calculating distances between the clusters. This is true for any of the Clustering methods within JMP. The only exception is if you provide the data as a distance matrix and choose the data is distance matrix option in the dialog for Hierarchical Clustering.</P>
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<P>For k- Means, the JMP help refers to the SAS FASTCLUS Procedure documentation found <A href="https://support.sas.com/documentation/onlinedoc/stat/142/fastclus.pdf" target="_self">here</A>.</P>
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<P>Hope that helps.</P>Thu, 25 Jun 2020 15:08:59 GMTchris_kirchberg2020-06-25T15:08:59Zwhich distance does JMP use in clustering?
https://community.jmp.com/t5/Discussions/which-distance-does-JMP-use-in-clustering/m-p/275384#M53438
<P>Hello everybody.</P><P>I'm trying to understand which distance does JMP use in hierarchical clustering: the documentation in <A href="https://www.jmp.com/support/help/en/15.1/index.shtml#page/jmp/distance-method-formulas.shtml#ww177809" target="_blank" rel="noopener">https://www.jmp.com/support/help/en/15.1/index.shtml#page/jmp/distance-method-formulas.shtml#ww177809</A> seems to say "squared euclidean distance" but if I save the distance matrix (after clustering) what I get is the euclidean distance (not squared).</P><P>And what about the k-means method? It should use the euclidean distance, but I couldn't find the formulas.</P><P>Thank you in advance.</P>Thu, 25 Jun 2020 14:34:28 GMThttps://community.jmp.com/t5/Discussions/which-distance-does-JMP-use-in-clustering/m-p/275384#M53438francesco_della2020-06-25T14:34:28ZRe: which distance does JMP use in clustering?
https://community.jmp.com/t5/Discussions/which-distance-does-JMP-use-in-clustering/m-p/275394#M53441
<P>Hi <LI-USER uid="1067"></LI-USER> ,</P>
<P> </P>
<P>JMP uses <A href="https://en.wikipedia.org/wiki/Euclidean_distance" target="_self">Euclidean Distance</A> for the initial distance matrix calculation between observations and then the method chosen for calculating distances between the clusters. This is true for any of the Clustering methods within JMP. The only exception is if you provide the data as a distance matrix and choose the data is distance matrix option in the dialog for Hierarchical Clustering.</P>
<P> </P>
<P>For k- Means, the JMP help refers to the SAS FASTCLUS Procedure documentation found <A href="https://support.sas.com/documentation/onlinedoc/stat/142/fastclus.pdf" target="_self">here</A>.</P>
<P> </P>
<P>Hope that helps.</P>Thu, 25 Jun 2020 15:08:59 GMThttps://community.jmp.com/t5/Discussions/which-distance-does-JMP-use-in-clustering/m-p/275394#M53441chris_kirchberg2020-06-25T15:08:59ZRe: which distance does JMP use in clustering?
https://community.jmp.com/t5/Discussions/which-distance-does-JMP-use-in-clustering/m-p/275487#M53457
<P>thank you so much for your prompt answer, Chris<BR />I was just confused because the formula in the documentation definitely shows the SQUARED euclidean distance<BR />thank you again, regards</P>Thu, 25 Jun 2020 19:57:49 GMThttps://community.jmp.com/t5/Discussions/which-distance-does-JMP-use-in-clustering/m-p/275487#M53457francesco_della2020-06-25T19:57:49ZRe: which distance does JMP use in clustering?
https://community.jmp.com/t5/Discussions/which-distance-does-JMP-use-in-clustering/m-p/277072#M53853
<P>Hi <LI-USER uid="1067"></LI-USER> </P>
<P>No problem. The squared distance is used in the subsequent between cluster distance calculations in some methods, but the initial distance matrix between the observations is not squared.</P>
<P>Best,</P>Tue, 07 Jul 2020 14:44:04 GMThttps://community.jmp.com/t5/Discussions/which-distance-does-JMP-use-in-clustering/m-p/277072#M53853chris_kirchberg2020-07-07T14:44:04Z