Re: SVD, EIG and CHOL of a matrix

[Alberto Frigerio]

I looked for a code to find, for example, the SVD decomposition of a matrix .
I found it on the web and I tried to use it, but I got different results
from the Octave function SVD ... as you would see if you try ro run the
attached file, I got NaN results, which are not so good I believe . 

http://old.nabble.com/file/p27241250/svdmio.m svdmio.m 



Jaroslav Hajek-2 wrote:
> 
> On Tue, Jan 19, 2010 at 4:16 PM, Alberto Frigerio
> <address@hidden> wrote:
>>
>> Hello world, I'm a neofite in Octave and I'm trying to find the
>> eigenvalues /
>> eigenvectors, the singular value decomposition and the Cholesky
>> factorization of a square matrix A.
>>
>> I've seen that Octave has functions for doing all these things, but I
>> would
>> see HOW they work. I tried to make the SVD using the QR decomposition of
>> A,
>> but in doing QR I got completely different results ... may someone help
>> me?
>>
> 
> Please show exactly what you did, what you got and what you expected.
> 
> 
> -- 
> RNDr. Jaroslav Hajek, PhD
> computing expert & GNU Octave developer
> Aeronautical Research and Test Institute (VZLU)
> Prague, Czech Republic
> url: www.highegg.matfyz.cz
> _______________________________________________
> Help-octave mailing list
> address@hidden
> https://www-old.cae.wisc.edu/mailman/listinfo/help-octave
> 
> 

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