topic Re: Clustering in SAS 9.4 in Statistical Procedures

Clustering in SAS 9.4

ifb10 — Wed, 13 Nov 2024 09:44:03 GMT

Hello,

I have tried to implement DBSCAN and KNN clustering methods in SAS 9.4. After checking online resources, I found multiple articles on these specific clustering algorithms for SAS Viya but not much for SAS 9.4. Is there anything you could suggest? Currently, I am thinking of using PROC IML to write the algorithm myself. If there is anything ready to use, I would like to try that first.

Thank you!

Re: Clustering in SAS 9.4

PaigeMiller — Wed, 13 Nov 2024 11:05:33 GMT

PROC CLUSTER performs KNN clustering

https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.4/statug/statug_cluster_overview.htm

Re: Clustering in SAS 9.4

sbxkoenk — Wed, 13 Nov 2024 14:19:18 GMT

DBSCAN is available in SAS 9.4 in the IMSTAT Procedure (Analytics) and uses the SAS LASR Analytic Server.

IMSTAT = In-Memory Statistics.

SAS LASR Analytic Server
IMSTAT Procedure (Analytics)
CLUSTER Statement
https://go.documentation.sas.com/doc/en/bicdc/9.4/inmsref/p08w4hxeqsgklrn14aqs76gs01te.htm

BR, Koen

Re: Clustering in SAS 9.4

Ksharp — Thu, 14 Nov 2024 02:58:15 GMT

PROC MODECLUS is for KNN.

Re: Clustering in SAS 9.4

sbxkoenk — Thu, 14 Nov 2024 09:54:50 GMT

MODECLUS indeed.
Thanks for bringing this procedure from the back of my mind ... back to the front.

documentation : The MODECLUS Procedure
A SAS/IML module for k nearest neighbors : Compute nearest neighbors in SAS - The DO Loop
USING SAS TO FIND THE BEST K FOR K-NEAREST-NEIGHBOR CLASSIFICATION :
https://www.mwsug.org/proceedings/2011/coders/MWSUG-2011-CC01.pdf

BR, Koen

Re: Clustering in SAS 9.4

ifb10 — Fri, 15 Nov 2024 08:31:04 GMT

Thank you Koen,

I have initially also tried to use IMSTAT, however I always get following error: ERROR: Procedure IMSTAT not found.

This made me assume, that IMSTAT is not compatible with SAS 9.4, it might be an OnDemand issue however.

Best regards,

Tamás