[R] Matrix reduction

[Berend Hasselman]

On 06-04-2013, at 22:01, Bert Gunter <gunter.berton at gene.com> wrote:

> ?chol
> 
> ##also
> 

Quite true and therefore: 

?backsolve

# forwardsolve

and

?qr

# qr.solve

So there's a lot to choose from.

Berend


> -- Bert
> 
> On Sat, Apr 6, 2013 at 11:12 AM, Berend Hasselman <bhh at xs4all.nl> wrote:
>> 
>> On 06-04-2013, at 19:58, Angelo Scozzarella Tiscali <angeloscozzarella at tiscali.it> wrote:
>> 
>>> Well, I mean to use the elimination method to transform the matrix, for example, of  the coefficients of a linear equations system.
>>> 
>>> AS
>>> 
>> 
>> 
>> Well if you only need to solve a linear equation system have a look at solve.
>> If you have a special system (banded,tridiagonal) then limSolve may help.
>> If you need the LU decomposition itself use package Matrix and look at denseLU.
>> 
>> Berend
>> 
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> 
> 
> 
> -- 
> 
> Bert Gunter
> Genentech Nonclinical Biostatistics
> 
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