[SciPy-user] parameter bounds using leastsq
sransom at nrao.edu
Sat Nov 5 20:37:03 CST 2005
On Sat, Nov 05, 2005 at 06:07:56PM -0800, mike cantor wrote:
> Thanks Scott,
> How do you think it compares in terms of speed with the SciPy
> implementation that wraps C code? Speed is a big concern for me.
Speed is its one downfall. It is definitely much slower than
the SciPy leastsq (due to being completely done in C). I guess
there probably wouldn't be such a huge hit if you had a complex
function to optimize which dominated the run time, but if that
is not the case, figuring out a workaround for leastsq will
probably be your best bet.
> At 05:51 PM 11/5/2005, you wrote:
> >Just to remind people, there is a very full featured non-linear
> >least squares fitter that is written in pure python (but based
> >on MINPACK) available here:
> >It allows for constraints on paramters and gives error
> >estimates (computed from the covariance matrix) on the fitted
> >parameters in a convenient format.
> >On Sat, Nov 05, 2005 at 05:27:00PM -0800, mike cantor wrote:
> > > Is there any way to enforce upper and/or lower bounds on parameters (x0)
> > > optimized by leastsq? If not can anyone tell me where I might look to
> > hack
> > > this?
> > >
> > > Thanks,
> > > -mike
> > >
> > > _______________________________________________
> > > SciPy-user mailing list
> > > SciPy-user at scipy.net
> > > http://www.scipy.net/mailman/listinfo/scipy-user
> >Scott M. Ransom Address: NRAO
> >Phone: (434) 296-0320 520 Edgemont Rd.
> >email: sransom at nrao.edu Charlottesville, VA 22903 USA
> >GPG Fingerprint: 06A9 9553 78BE 16DB 407B FFCA 9BFA B6FF FFD3 2989
> >SciPy-user mailing list
> >SciPy-user at scipy.net
> SciPy-user mailing list
> SciPy-user at scipy.net
Scott M. Ransom Address: NRAO
Phone: (434) 296-0320 520 Edgemont Rd.
email: sransom at nrao.edu Charlottesville, VA 22903 USA
GPG Fingerprint: 06A9 9553 78BE 16DB 407B FFCA 9BFA B6FF FFD3 2989
More information about the SciPy-user