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Lijuu
Obsidian | Level 7

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.

1 ACCEPTED SOLUTION

Accepted Solutions
Ksharp
Super User
proc logistic data=sashelp.class;
model sex=age|weight|height @2 ;
run;

View solution in original post

4 REPLIES 4
SAS_Rob
SAS Employee

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;

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

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