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Polyfit with scaling

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Thomas Weber-8 Polyfit with scaling - I'd like to propose the attached patch for polyfit.m It introduces an optional fourth bool parameter 'scale'. If not... Loading...
Dmitri A. Sergatskov On Jan 30, 2008 11:19 AM, Thomas Weber <thomas.weber.mail@...> wrote: > I'd like to propose the attached patch... Loading...
Thomas Weber-8 Am Mittwoch, den 30.01.2008, 17:48 -0600 schrieb Dmitri A. Sergatskov: > On Jan 30, 2008 11:19 AM, Thomas Weber... Loading...
Ben Abbott On Jan 31, 2008, at 3:40 AM, Thomas Weber wrote: > > Am Mittwoch, den 30.01.2008, 17:48 -0600 schrieb Dmitri A.... Loading...
Thomas Weber-8 On 31/01/08 07:47 -0500, Ben Abbott wrote: > It doesn't appear that the example has much comparative... Loading...
Ben Abbott On Jan 31, 2008, at 3:08 PM, Thomas Weber wrote: > On 31/01/08 07:47 -0500, Ben Abbott wrote: >> It doesn't appear... Loading...
Ben Abbott On Jan 31, 2008, at 9:26 PM, Ben Abbott wrote: > On Jan 31, 2008, at 3:08 PM, Thomas Weber wrote: > >> On... Loading...
Rolf Fabian Dear Ben Without testing it, I looked shortly at the code of your polyfit.m and found close to the end: ... Loading...
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... Loading...
Thomas Weber-8 On 01/02/08 07:26 -0800, Rolf Fabian wrote: > Without testing it, I looked shortly at the code of > your polyfit.m... Loading...
Ben Abbott On Feb 1, 2008, at 3:57 PM, Thomas Weber wrote: > On 01/02/08 07:26 -0800, Rolf Fabian wrote: >> Without testing... Loading...
Ben Abbott Using the same approach as applied in wpolyfit, it is possible to improve the numerical stability/accuracy of... Loading...
Dmitri A. Sergatskov Though I was partially responsible for all this discussions, I am now rethinking this approach. polyfit should be as... Loading...
Ben Abbott On Feb 2, 2008, at 3:00 PM, Dmitri A. Sergatskov wrote: > Though I was partially responsible for all this... Loading...
Dmitri A. Sergatskov On Feb 2, 2008 2:28 PM, Ben Abbott <bpabbott@...> wrote: > Regarding "scale x unconditionally", do you refer to... Loading...
Ben Abbott On Feb 2, 2008, at 3:57 PM, Dmitri A. Sergatskov wrote: > On Feb 2, 2008 2:28 PM, Ben Abbott <bpabbott@...>... Loading...
Ben Abbott I invested some time looking at the stability of polyfit under different conditions. The four cases I considered... Loading...
Dmitri A. Sergatskov On Feb 3, 2008 6:20 PM, Ben Abbott <bpabbott@...> wrote: > Give these results and the need to remain compatible... Loading...
Ben Abbott On Feb 3, 2008, at 7:50 PM, Dmitri A. Sergatskov wrote: > On Feb 3, 2008 6:20 PM, Ben Abbott <bpabbott@...>... Loading...
Rolf Fabian Lets say that way: The majority of Octave's mapping functions is able to handle complex arguments. But... Loading...
Thomas Weber-8 Am Sonntag, den 03.02.2008, 19:20 -0500 schrieb Ben Abbott: > Give these results and the need to remain compatible... Loading...
Rolf Fabian In summer 2004 I already did a similar study on 'polyfit'. About the 2nd output argument of 'chol' see... Loading...
Ben Abbott On Feb 4, 2008, at 5:04 AM, Thomas Weber wrote: > > Am Sonntag, den 03.02.2008, 19:20 -0500 schrieb Ben... Loading...
Ben Abbott I've modified polyfit.m to be consistent with the Matlab's version. In short, "help polyfit" replies octave:168>... Loading...
John W. Eaton On 4-Feb-2008, Ben Abbott wrote: | I've modified polyfit.m to be consistent with the Matlab's version. | I've... Loading...
Dmitri A. Sergatskov Looks good, though i have a couple minor comments: -- if std(x) == 0 then it means that all x are the same number... Loading...
John W. Eaton On 4-Feb-2008, Dmitri A. Sergatskov wrote: | -- I really do not like have variables that different only in |... Loading...
Ben Abbott On Monday, February 04, 2008, at 04:21PM, "Dmitri A. Sergatskov" <dasergatskov@...> wrote: >Looks good, though i... Loading...
Ben Abbott On Feb 4, 2008, at 4:21 PM, Dmitri A. Sergatskov wrote: > -- if std(x) == 0 then it means that all x are the same... Loading...
Dmitri A. Sergatskov On Feb 4, 2008 6:16 PM, Ben Abbott <bpabbott@...> wrote: > > On Feb 4, 2008, at 4:21 PM, Dmitri A. Sergatskov... Loading...
Ben Abbott On Feb 4, 2008, at 7:44 PM, Dmitri A. Sergatskov wrote: > On Feb 4, 2008 6:16 PM, Ben Abbott <bpabbott@...>... Loading...
Ben Abbott On Feb 4, 2008, at 8:07 PM, Dmitri A. Sergatskov wrote: > On Feb 4, 2008 7:01 PM, Ben Abbott <bpabbott@...>... Loading...
Ben Abbott Re: Polyfit with scaling - Q regarding polyval - I'm moving past polyfit, and looking into what is needed for polyval. I'm finding that my grasp of statistics is... Loading...
Ben Abbott Re: Polyfit with scaling - Q regarding polyconf - I've completed the change to polyfit() and polyval(). However, the tolerance/prediction intervals calculated by my... Loading...
Thomas Weber-8 Am Mittwoch, den 13.02.2008, 07:32 -0500 schrieb Ben Abbott: > Thomas, can you run the script below in Matlab and post... Loading...
Ben Abbott On Wednesday, February 13, 2008, at 08:31AM, "Thomas Weber" <thomas.weber.mail@...> wrote: >Am Mittwoch, den... Loading...
Thomas Weber-8 On 13/02/08 07:34 -0800, Ben Abbott wrote: > The only thing that appears to agree with Matlab is the result from >... Loading...
Ben Abbott On Feb 13, 2008, at 3:32 PM, Thomas Weber wrote: > On 13/02/08 07:34 -0800, Ben Abbott wrote: >> The only thing... Loading...
Ben Abbott On Feb 13, 2008, at 10:34 AM, Ben Abbott wrote: > > The only thing that appears to agree with Matlab is the result... Loading...
Ben Abbott [Patch] Polyfit with scaling - Both polyfit.m and polyval.m have been modified. 2008-02-14 Ben Abbott <bpabbott@...> *... Loading...
Dmitri A. Sergatskov On Thu, Feb 14, 2008 at 8:01 PM, Ben Abbott <bpabbott@...> wrote: > +## The Vandermonde matrix matrix used to... Loading...
Ben Abbott On Feb 14, 2008, at 9:18 PM, Dmitri A. Sergatskov wrote: > On Thu, Feb 14, 2008 at 8:01 PM, Ben Abbott... Loading...
Ben Abbott Re: [changeset] Polyfit with scaling - Replacing the patch with a mercurial export. # HG changeset patch # User Ben Abbott <bpabbott@...> # Date... Loading...
John W. Eaton On 19-Feb-2008, Ben Abbott wrote: | Replacing the patch with a mercurial export. The long lines in this message... Loading...
Ben Abbott On Feb 19, 2008, at 1:53 PM, John W. Eaton wrote: > On 19-Feb-2008, Ben Abbott wrote: > > | Replacing the patch... Loading...
John W. Eaton I applied this changeset with a few minor style changes. Thanks, jwe Loading...
John W. Eaton On 20-Feb-2008, John W. Eaton wrote: | I applied this changeset with a few minor style changes. Now I see the... Loading...
Ben Abbott On Feb 20, 2008, at 1:17 AM, John W. Eaton wrote: > On 20-Feb-2008, John W. Eaton wrote: > > | I applied this... Loading...
John W. Eaton On 20-Feb-2008, Ben Abbott wrote: | My bad. I should have tested for a relative improvement over the |... Loading...
Ben Abbott On Feb 20, 2008, at 9:34 PM, John W. Eaton wrote: > On 20-Feb-2008, Ben Abbott wrote: > > | My bad. I should... Loading...
John W. Eaton On 20-Feb-2008, Ben Abbott wrote: | Ok, I'm starting fresh for the 2nd time tonight! | | This time I'll minimize... Loading...
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