power law fitting of data

hi jessica,
This FittingData tutorial is very nice. Could you illustrate how to fix/thaw parameters?
I did not find any such attribute and when I try some kludges they fail with a msg saying
<type 'exceptions.ValueError'>: shape mismatch: objects cannot be broadcast to a single shape

thanks,
Johann

Hi Johann,

I would recommend using the python mpfit module:

http://cars9.uchicago.edu/software/python/mpfit.html

Cheers,
Jessica

···

On Dec 22, 2007, at 8:57 PM, Johann Cohen-Tanugi wrote:

hi jessica,
This FittingData tutorial is very nice. Could you illustrate how to
fix/thaw parameters?
I did not find any such attribute and when I try some kludges they fail
with a msg saying
<type 'exceptions.ValueError'>: shape mismatch: objects cannot be
broadcast to a single shape

thanks,
Johann

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Is there a new version of this which uses numpy instead of Numeric? I found the old Numeric version to work very well.

cheers,
William

···

On Dec 26, 2007 12:58 PM, Jessica Lu < jlu@…1634…> wrote:

Hi Johann,

I would recommend using the python mpfit module:

http://cars9.uchicago.edu/software/python/mpfit.html

Cheers,
Jessica

On Dec 22, 2007, at 8:57 PM, Johann Cohen-Tanugi wrote:

hi jessica,
This FittingData tutorial is very nice. Could you illustrate how to
fix/thaw parameters?
I did not find any such attribute and when I try some kludges they

fail
with a msg saying
<type ‘exceptions.ValueError’>: shape mismatch: objects cannot be
broadcast to a single shape

thanks,
Johann



This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft® Visual Studio 2005.

http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/


Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net

https://lists.sourceforge.net/lists/listinfo/matplotlib-users


This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft® Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/


Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net

https://lists.sourceforge.net/lists/listinfo/matplotlib-users

hi jessica, thanks.... So scipy.optmizer as it stands cannot do that? I gues I should move the issue to the scipy list then. Yes there is mpfit, there is also pyminuit in google.code that is wrapper of the high energy physics standard package MINUIT, etc.... but I would think that fitting data, with fixed/thawed parameters, is a basic feature of a scientific package. As there seems to be a snergy between matplotlib and scipy, I would expect the latter to take care of optimization....
thanks for the replies,
Johann

Jessica Lu wrote:

···

Hi Johann,

I would recommend using the python mpfit module:

http://cars9.uchicago.edu/software/python/mpfit.html

Cheers,
Jessica

On Dec 22, 2007, at 8:57 PM, Johann Cohen-Tanugi wrote:

hi jessica,
This FittingData tutorial is very nice. Could you illustrate how to
fix/thaw parameters?
I did not find any such attribute and when I try some kludges they fail
with a msg saying
<type 'exceptions.ValueError'>: shape mismatch: objects cannot be
broadcast to a single shape

thanks,
Johann

-------------------------------------------------------------------------

This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Hi Johann,

I believe the scipy optimization package gives a variety of optimization algorithms but you would have to implement your own codes to fix/thaw parameters. That being said, there is a lot there and I haven't dug into all of it into detail. I would suggest posting a message to the scipy mailing list after the holidays and you may get a better response.

Cheers,
Jessica

···

On Dec 26, 2007, at 3:52 PM, Johann Cohen-Tanugi wrote:

hi jessica, thanks.... So scipy.optmizer as it stands cannot do that? I gues I should move the issue to the scipy list then. Yes there is mpfit, there is also pyminuit in google.code that is wrapper of the high energy physics standard package MINUIT, etc.... but I would think that fitting data, with fixed/thawed parameters, is a basic feature of a scientific package. As there seems to be a snergy between matplotlib and scipy, I would expect the latter to take care of optimization....
thanks for the replies,
Johann

Jessica Lu wrote:

Hi Johann,

I would recommend using the python mpfit module:

http://cars9.uchicago.edu/software/python/mpfit.html

Cheers,
Jessica

On Dec 22, 2007, at 8:57 PM, Johann Cohen-Tanugi wrote:

hi jessica,
This FittingData tutorial is very nice. Could you illustrate how to
fix/thaw parameters?
I did not find any such attribute and when I try some kludges they fail
with a msg saying
<type 'exceptions.ValueError'>: shape mismatch: objects cannot be
broadcast to a single shape

thanks,
Johann

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users