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From: David.T on 10 May 2010 13:52
Hi,

I'm trying to create a regression model with a large set of
covariates. I know the ranges that coefficients for particular
covariates should be in and I was wondering if its possible to set it
in SAS, such that the output models I receive take those ranges into
account.

To clarify, say I know that the coefficient for X1 should be between
2-4. Is it possible to set within SAS those boundaries so that any
models that it outputs will only have X1's coefficients come out
between 2 and 4?
From: Paige Miller on 11 May 2010 08:15
On May 10, 1:52 pm, "David.T" <davidt7...(a)gmail.com> wrote:
> Hi,
>
> I'm trying to create a regression model with a large set of
> covariates. I know the ranges that coefficients for particular
> covariates should be in and I was wondering if its possible to set it
> in SAS, such that the output models I receive take those ranges into
> account.
>
> To clarify, say I know that the coefficient for X1 should be between
> 2-4. Is it possible to set within SAS those boundaries so that any
> models that it outputs will only have X1's coefficients come out
> between 2 and 4?

Even if you want a linear regression, I believe the only way to do
this in SAS is to use PROC NLIN, with the BOUNDS statement.

--
Paige Miller
paige\dot\miller \at\ kodak\dot\com
From: David.T on 11 May 2010 09:29
On May 11, 8:15 am, Paige Miller <paige.mil...(a)kodak.com> wrote:
> On May 10, 1:52 pm, "David.T" <davidt7...(a)gmail.com> wrote:
>
> > Hi,
>
> > I'm trying to create a regression model with a large set of
> > covariates. I know the ranges that coefficients for particular
> > covariates should be in and I was wondering if its possible to set it
> > in SAS, such that the output models I receive take those ranges into
> > account.
>
> > To clarify, say I know that the coefficient for X1 should be between
> > 2-4. Is it possible to set within SAS those boundaries so that any
> > models that it outputs will only have X1's coefficients come out
> > between 2 and 4?
>
> Even if you want a linear regression, I believe the only way to do
> this in SAS is to use PROC NLIN, with the BOUNDS statement.
>
> --
> Paige Miller
> paige\dot\miller \at\ kodak\dot\com

Thanks Paige, thats all I needed.

Cheers,
David T.
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