How to provide stopping criteria for clustering

[K_coder]

I am trying to provide stopping criteria for clustering if K(no of cluster) is less than number of rows.

I have tried using PROC IML, but not getting proper output.

data abc1;
input A;
datalines;
20
;

%MACRO ABC(Data);
     proc fastclus data=&Data maxc=2 out=corrCluster noprint;
     run;
%MEND ABC;

proc iml;     
     use abc1;
     read all into X1;
			
     if(nrow(X1)>=2) then
     do;
   	%ABC(abc1);
     end;
quit;

Can you plz tell how to fix above...

Or is there another way to do this?

[Ksharp · Accepted solution]

Make a macro for it .

%MACRO ABC(Data);
     %let dsid=%sysfunc(open( &data ));
     %let nobs=%sysfunc(attrn(&dsid, nlobs ));
     %let dsid=%sysfunc(close(&dsid));

    %if &nobs > 2 %then %do;
     proc fastclus data=&Data maxc=2 out=corrCluster noprint;
     run;
    %end;
%MEND ABC;




   	%ABC(abc1)