[SciPy-User] Fitting tools

Gökhan Sever gokhansever@gmail....
Wed Apr 14 01:47:26 CDT 2010


Erik,

Thanks for the fix. It works now. Finally I was able to launch the graphical
interface as well. Is it possible to get parameter estimates using the GUI?

On Tue, Apr 13, 2010 at 1:13 AM, Erik Tollerud <erik.tollerud@gmail.com>wrote:

> Ok, I just committed a patch that I think should fix the particular
> problem you were encountering - let me know if it does not, or if you
> encounter some other problem trying to run the fitgui.
>
> Also, if you there are some models/distributions you want to use that
> are not already included in the builtin models (rather likely, as most
> of them are astronomy-related aside from the basics like gaussian,
> linear, polynomial, and so on) it's straightforward to add new ones in
> your own code and register them so that the gui will display them as
> options.  If it's a fairly standard distribution, feel free to submit
> it to me and I can add it to the astropysics builtins, as well.
>
>
> On Mon, Apr 12, 2010 at 12:54 PM, Gökhan Sever <gokhansever@gmail.com>
> wrote:
> >
> >
> > On Mon, Apr 12, 2010 at 12:34 PM, <josef.pktd@gmail.com> wrote:
> >>
> >> On Mon, Apr 12, 2010 at 1:14 PM, Gökhan Sever <gokhansever@gmail.com>
> >> wrote:
> >> > Hello,
> >> >
> >> > Are there any compact curve/distribution fitting tools around similar
> to
> >> > the
> >> > commercial TableCurve 2D [1] and EasyFit [2] products?
> >> >
> >> > [1] http://www.sigmaplot.com/products/tablecurve2d/tablecurve2d.php
> >>
> >> I think astrogui, or astropysics might have something like this,
> >> Travis showcased it briefly in the stats webinar. There is also an
> >> online curve fitting (zunzun ?) with (I think) BSD licensed source
> >> code that might be useful.
> >>
> >> > [2] http://www.mathwave.com/easyfit-distribution-fitting.html
> >>
> >> I looked at easyfit a year or more ago, and wrote a script that tried
> >> to do similar fitting for all distributions in scipy.stats. It worked
> >> ok for distributions with unlimited support, but there are still the
> >> problems with estimating distributions with a finite bound in the
> >> support.
> >> I used kstest as distance measure, but never rewrote Anderson-Darling
> >> to function as generic distance measure as (if I remember correctly)
> >> easyfit does.
> >>
> >> Josef
> >
> > Thanks for the input Josef.
> >
> > I have known astrogui from Travis' webinar as well. However I have never
> > been able to run it. Maybe Erik could make some comments to fix the
> problem:
> >
> > # Using bzr branch lp:astropysics
> >
> > python
> > Python 2.6.2 (r262:71600, Jan 25 2010, 18:46:45)
> > [GCC 4.4.2 20091222 (Red Hat 4.4.2-20)] on linux2
> > Type "help", "copyright", "credits" or "license" for more information.
> >>>> from astropysics import gui
> >
> /home/gsever/Desktop/python-repo/ETS_3.3.1/Enable_3.2.1/enthought/kiva/fonttools/font_manager.py:1064:
> > UserWarning: Could not match sans-serif, normal, normal.  Returning
> > /usr/share/fonts/khmeros/KhmerOS.ttf
> >   warnings.warn('Could not match %s, %s, %s.  Returning %s' % (name,
> style,
> > variant, self.defaultFont))
> >
> /usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/io.py:34:
> > UserWarning: pyfits not found - all FITS-related IO will not work
> >   warn('pyfits not found - all FITS-related IO will not work')
> >
> /usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/io.py:314:
> > UserWarning: vo.table not found - VOTable processing limited to
> > VOTableReader class
> >   warn('vo.table not found - VOTable processing limited to VOTableReader
> > class')
> >
> /usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/phot.py:2742:
> > UserWarning: SExtractor not found on system - phot.SExtractor class will
> not
> > function
> >   warn('SExtractor not found on system - phot.SExtractor class will not
> > function')
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/gui/__init__.py",
> > line 28, in <module>
> >     from spectarget import spec_target
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/gui/spectarget.py",
> > line 18, in <module>
> >     from ..phot import CMDAnalyzer
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/phot.py",
> > line 3463, in <module>
> >     Spectrum._rgbsensitivity = __generateRGBSensTuple()
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/phot.py",
> > line 3455, in __generateRGBSensTuple
> >     from .models import BlackbodyModel
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/models/__init__.py",
> > line 73, in <module>
> >     from core import *
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/models/core.py",
> > line 2247, in <module>
> >     class
> FunctionModel2DScalar(FunctionModel,InputCoordinateTransformer):
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/models/core.py",
> > line 2253, in FunctionModel2DScalar
> >     from ..coords import cartesian_to_polar,polar_to_cartesian
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/coords.py",
> > line 2447, in <module>
> >     solsysobjs['sun'] = Sun()
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/coords.py",
> > line 2267, in __init__
> >
> EphemerisObject.__init__(self,name='Sol',jd0=KeplerianOrbit.jd2000-0.5)
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/coords.py",
> > line 1791, in __init__
> >     self.jd0 = EphemerisObject.jd2000 if jd0 is None else jd0
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/coords.py",
> > line 1799, in _setJd0
> >     from .obstools import calendar_to_jd
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/obstools.py",
> > line 1580, in <module>
> >     sites['uciobs'] =
> > Site(33.63614044191056,-117.83079922199249,80,'PST','UC Irvine
> Observatory')
> >   File
> >
> "/usr/lib/python2.6/site-packages/Astropysics-0.1.dev-py2.6.egg/astropysics/obstools.py",
> > line 498, in __init__
> >     raise ValueError('unrecognized time zone string '+tz)
> > ValueError: unrecognized time zone string PST
> >
> >
> > --
> > Gökhan
> >
>



-- 
Gökhan
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