R help - Sep 2014 - Help with R solve

I need someone to help with solution for a system of linear equations  A%*%x =b,
where A is the coefficient matrix and b is right hand-side constant column.

My question is that is there any option in the qr.solve to get a non-negative
solution for x column, when more than one possible solution happens in the
system.

Thanks,
Y.L.

This question is about linear algebra theory, or perhaps linear programming, not
about R. There is no magic parameter to solve this for you... either there is a
non-negative solution or there isn't.
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On September 21, 2014 7:10:19 PM PDT, "Lio, Yuhlong" <Yuhlong.Lio
at usd.edu> wrote:
>
>I need someone to help with solution for a system of linear equations 
>A%*%x =b, where A is the coefficient matrix and b is right hand-side
>constant column.  
>
>My question is that is there any option in the qr.solve to get a
>non-negative solution for x column, when more than one possible
>solution happens in the system.
>
>Thanks,
>Y.L. 
>______________________________________________
>R-help at r-project.org mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.

On 22-09-2014, at 04:10, Lio, Yuhlong <Yuhlong.Lio at usd.edu> wrote:
> 
> I need someone to help with solution for a system of linear equations 
A%*%x =b, where A is the coefficient matrix and b is right hand-side constant
column.
> 
> My question is that is there any option in the qr.solve to get a
non-negative solution for x column, when more than one possible solution happens
in the system.

If you are referring to an underdetermined system of linear equations have a
look here:

http://en.wikipedia.org/wiki/System_of_linear_equations

section Matrix solution.

Berend