Re: Restrict statement in PROC REG

tania_hf · Posted 12-05-2016 06:19 AM

Bonjour,

Dans une PROC REG, je souhaite savoir s'il est possible de spécifier à la constante du modèle d'être inférieure à 1.

Le statement du type RESCTRICT intercept < 1 ne semble pas fonctionner...

Merci d'avance pour votre aide.

mkeintz · Posted 12-05-2016 06:52 AM

The RESTRICT statement allows only equality constraints, not inequality constraints.

--------------------------
The hash OUTPUT method will overwrite a SAS data set, but not append. That can be costly. Consider voting for Add a HASH object method which would append a hash object to an existing SAS data set

Would enabling PROC SORT to simultaneously output multiple datasets be useful? Then vote for
Allow PROC SORT to output multiple datasets

--------------------------

Ksharp · Posted 12-05-2016 09:22 AM

Or you could use SAS/OR  or  SAS/IML to get it.
Post your question at OR or IML forum, and explain your question in English.

Rick_SAS · Posted 12-05-2016 09:44 AM

See this SAS NOTE about restricting model parameters. You cannot use the RESTRICT statement in PROC REG to specify an upper bound, but other procedures allow it. For example, to ensure that the intercept term is not negative, you can use

proc fmm data=sashelp.class;
model weight = height;
restrict int 1 >= 0;
run;

For your problem, use

restrict int 1 <= 1;

Restrict statement in PROC REG