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From: "atanas " <atanaslove2000@abv.bg>
Newsgroups: comp.soft-sys.matlab
Subject: Re: orthogonal matrix
Date: Sun, 25 Apr 2010 17:42:05 +0000 (UTC)
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"Roger Stafford" <ellieandrogerxyzzy@mindspring.com.invalid> wrote in message <hr1tgd$fe5$1@fred.mathworks.com>...
> "atanas " <atanaslove2000@abv.bg> wrote in message <hr1p7k$dtd$1@fred.mathworks.com>...
> > Sir Stafford,
> > thank against.
> > C's matrices are ready orhogonal. 
> > D's matrices need to find that
> > Q = [D0 D1 D2 D3 zeros(2,2) zeros(2,2);
> >        zeros(2,2) zeros(2,2) D0 D1 D2 D3]
> > must satisfy 
> > V*V'=eye(2); (condition 1)
> > V*Q'=zeros(2); (condition 2)
> > Q*V'=zeros(2); (condition 3)
> > Q*Q'=eye(2); (condition 4).
> > I have already only condition 1!
> > Need to find conditions 2, 3 and 4. 
> > That all.
> > Thanks for your help.
> ----------
>   That answers my first question, but my second question was "Have you figured out how to generate examples of C's in matlab that would satisfy (2)?"  That is, V*V' = eye(4).  Never mind the D's for the moment.
> 
>   As Bruno indicates, you can make good use of 'orth'.  The same is true of 'null'.
> 
>   Have a try at it, Atanas.  I think you will find the effort very rewarding.
> 
> Roger Stafford

Sir Stafford,
This is matrix L: 
V =[    0   -0.0407    0.0873   -0.1484    0.9072    0.3460    0.1610         0
         0    0.0048   -0.0103    0.0175   -0.1069   -0.0998    0.8401    0.5219];
>> V*V'
ans =
    1.0000    0.0000
    0.0000    1.0000
This is good!
I need to find matrix Q!
Thanks again.