[R] regression constraints?

[Adam Gehr]

"Strumila, John" wrote:
> 
> gday R gurus,
> 
> I have a multivariate regression for which I want to constrain the
> coefficients to be > 0.  Is this possible?
> 
> I've check the doco and searched CRAN but can't find anything.
> 
> thanks,
> John Strumila

I've been doing something like that (regression coefficients
constrained 
to be > 0 and also forced to sum to 1) using the quadratic
programming program solve.QP in package quadprog. 

    Adam Gehr
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._