Hi all,   I am new to this forum. I have the following problem in SAS EM. The neighbors out of MBR node have  wrong orders. To illustrate the problem I wrote a simple program and I used proc pmbr to do the calculations.   data t1; input y x1 x2; id = _n_; cards; 1 12 14 1 11 10 0 3 4 0 5 2 ; data t2; input y x1 x2; cards; 1 10 12 1 12 12 0 2 1 ; run; proc dmdb data=t1 dmdbcat=work.temp; var x1 x2; class y; run; proc pmbr data=t1 dmdbcat=work.temp k=1 method=scan outest=t1_out neighbors ; target y; id id; score outfit=t2_fit data=t2 out=t2_out role=validation; run; proc print data=t2_out; run; proc pmbr data=t1 dmdbcat=work.temp k=2 method=scan outest=t1_out neighbors ; target y; id id; score outfit=t2_fit data=t2 out=t2_out role=validation; run; proc print data=t2_out; run; proc pmbr data=t1 dmdbcat=work.temp k=3 method=scan outest=t1_out neighbors ; target y; id id; score outfit=t2_fit data=t2 out=t2_out role=validation; run; proc print data=t2_out; run; as you see from the output the orders of neighbors are not correct, i.e. in the first output _n1 is 2 but the second output _n1 is 1. How I can produce the values of _n: in such a way that _n1 shows the first nn , _n2 shows the second nn, ...?   Thanks. ... View more