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VanDalucas
Obsidian | Level 7

Hi,

 

I am using the Variable clustering node in order to choose some variables as input to clustering node. Should I also choose an unsigned variable i.e. a variable from CLUS 0 or should I totally ignore these variables and only choose one variable form CLUS1,CLUS2,... ?

 

Thanks a lot!

4 REPLIES 4
rayIII
SAS Employee

I would tend to ignore them unless you have a really strong reason to include them. They could be constants for example. 

 

It sounds like you are using interactive selection, but if you switch to Best Variables you can see that EM rejects the CLUS0 variables. 

 

Hope this helps.

 

Ray

VanDalucas
Obsidian | Level 7

Thank you very much Rey,

By the way, how many Variables do you usually input in cluster node? 2 to 7 is ok right?

rayIII
SAS Employee

Sure, no problem. While sometimes many more variables are used as inputs there is nothing wrong with clustering a small number. The iris data are often used as an example and it only has 4 inputs. 

 

https://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_cluster_sec...

 

Ray

VanDalucas
Obsidian | Level 7

Thanks again Ray!

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