Polyfit with scaling

[Ben Abbott]

On Feb 1, 2008, at 9:15 AM, Ben Abbott wrote:

>
> On Jan 31, 2008, at 9:26 PM, Ben Abbott wrote:
>
> I should mention that nothing has been done to ensure that the  
> second output respects the normalization of the dependent variable.
>
> I'll look into what needs to be done there, if it is possible ... or  
> more to the point, if I'm up to the task ;-)
>
> If anyone has experience or background in how the job might be done,  
> please feel free to contribute or to point me in the right direction!
>
> Ben
>

I've added some code to mock the 2nd output, and have fixed a bug.

In this version, the Cholesky factor and the Vandermonde matrix which  
are returned as fields on the 2nd output are not used in the  
solution.  The matrices that are used are representative of the scaled  
version of x.

While this is not a pretty solution, I don't know what else might be  
done. Any thoughts?

Ben

-------------- next part --------------
A non-text attachment was scrubbed...
Name: polyscale.m
Type: application/octet-stream
Size: 1723 bytes
Desc: not available
Url : https://www.cae.wisc.edu/pipermail/octave-maintainers/attachments/20080201/29b477f0/attachment.obj 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: polyshift.m
Type: application/octet-stream
Size: 1895 bytes
Desc: not available
Url : https://www.cae.wisc.edu/pipermail/octave-maintainers/attachments/20080201/29b477f0/attachment-0001.obj 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: polyfit.m
Type: application/octet-stream
Size: 5527 bytes
Desc: not available
Url : https://www.cae.wisc.edu/pipermail/octave-maintainers/attachments/20080201/29b477f0/attachment-0002.obj