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Re: weighted residuals are not real
From: |
Ben Abbott |
Subject: |
Re: weighted residuals are not real |
Date: |
Fri, 18 Nov 2011 17:27:09 -0500 |
On Nov 18, 2011, at 4:31 PM, Olaf Till wrote:
> On Fri, Nov 18, 2011 at 10:43:59AM -0500, Ben Abbott wrote:
>>
>> On Nov 18, 2011, at 9:54 AM, Preeti Gaikwad wrote:
>>
>>> now to solve this problem and to get best fit I want to remove some points
>>> from x and y like from x i want to remove bad points
>>> 1.44 1.64 1.71 1.84 1.87 1.95 2.17
>>>
>>> total 7 points and same the colum from y
>>> then u see I am getting this error......thanks a lot for ur help and work
>>
>> Ok. I see the error now. I'm not familiar with the leasqr.m code, but from
>> what I infer it looks like a bug.
>>
>> http://octave.sourceforge.net/bugs.html
>>
>> I've attached an archive with all the files needed to reproduce the error
>> with run.
>>
>> Ben
>
> Thanks for preparing this, but why do you think it is a bug? The error
> happens when
> leasqr tries the parameters [3.79885888315165; 2.53178132967943], which are
> inside
> the bounds. The users model function returns non-real residuals for these
> parameters,
> and this is reported with an error. I can't see a bug. Am I missing something?
>
> Olaf
>
When I ran the example and saved the "pin" (passed to __lm_svd__.m) that
resulted in non-real residues, pin = [0.1 3.0] which produce should produce
real residues.
I didn't bother to dig into the details of how leasqr works, so I may have
overlooked something.
Ben
- Re: weighted residuals are not real, (continued)
- Re: weighted residuals are not real, Ben Abbott, 2011/11/18
- Re: weighted residuals are not real, preeti gaikwad, 2011/11/18
- Re: weighted residuals are not real, Ben Abbott, 2011/11/18
- Message not available
- Message not available
- Re: weighted residuals are not real, Preeti Gaikwad, 2011/11/18
- Message not available
- Re: weighted residuals are not real, Preeti Gaikwad, 2011/11/18
- Re: weighted residuals are not real, Ben Abbott, 2011/11/18
- Re: weighted residuals are not real, Preeti Gaikwad, 2011/11/18
- Re: weighted residuals are not real, Ben Abbott, 2011/11/18
- Re: weighted residuals are not real, Preeti Gaikwad, 2011/11/18
- Re: weighted residuals are not real, Olaf Till, 2011/11/18
- Re: weighted residuals are not real,
Ben Abbott <=