Inclusion automatic possible interaction for variable selection using proc logistic

[Lijuu]

Dear All

How can i include automatically all possible interaction of main effects to make variable selection?

here the code
proc logistic data=main;
model y/n= a   b   c   d   e  /selection=stepwise slentry=0.10 slstay=0.150 details lackfit;
run;

desired consideration:

proc logistic data=main;
model y/n= a   b   c   d   e  a*b   a*c   a*d    a*e    b*c    b*d   b*e   c*d    c*e    d*e /selection=stepwise slentry=0.10 slstay=0.150 details lackfit;
run;

Thank you much.

[SAS_Rob]

you can use the | notation with the @ to specify the degree.  For all two way interactions it would be:

model y/n= a|b|c|d|e @2 /selection=stepwise slentry=0.10 slstay=0.150 details lackfit;

[Lijuu]

Dear:
Thank you!

[Ksharp · Accepted solution]

proc logistic data=sashelp.class;
model sex=age|weight|height @2 ;
run;

[Lijuu]

Dear Ksharp:
Thank you much!