[R] Reducing augmented matrices

[Charles C. Berry]

On Tue, 19 Jan 2010, jshort wrote:

>
> Hi
>
> How does one tell R that one is using an augmented matrix as appose to an
> non-augmented matrix?
>

Explicitly creating an augmented matrix is unnecessary and 
awkward if the object is to solve a system of linear equations.

See:

 	?solve

HTH,

Chuck



> For instance, when I want to solve two equations in two unknowns, I will
> have to solve a 2 by 3 augmented matrix, however all I know to type into R
> is something like this;
>
> weights = c(1,2,3,4,5,6) (say)
>
> M1=matrix(weights,ncol=3).
>
> Does R correctly interpret me when I write the above code?
>
> Furthermore, how do I reduce this augmented matrix in R such that it will
> give me my two unknown variables?
>
> Thanks so much.
> -- 
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>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901