[SciPy-User] A bug in SLSQP?

[Ralf Gommers]

On Tue, May 5, 2015 at 8:08 PM, Yuxiang Wang <yw5aj at virginia.edu> wrote:

> Dear all,
>
> Oops - sorry. Please disregard my previous email. Even though it
> complains (the warning), it still filled the xl and xu with the right
> values.
>
> Sorry again for the spamming.
>

Thanks for the quick update. Looks to me like there's something to fix
though. Your bounds are specified correctly, so there shouldn't be a
warning like that. Can you provide a self-contained example that reproduces
the warning and open an issue?

Ralf



>
> Shawn
>
> On Tue, May 5, 2015 at 1:41 PM, Yuxiang Wang <yw5aj at virginia.edu> wrote:
> > Dear all,
> >
> > In using scipy.optimize.minimize, I encountered a bug when using bounds.
> >
> > My bounds is set as: bounds = ((0, None), (0, None), (0, 1), (0, None))
> >
> > Then, it will say invalid value encountered in greater bnderr =
> > where(bnds[:, 0] > bnds[:, 1])[0]
> >
> > I looked into slsqp.py, and in line 330, it checks: if bounds is None
> > or len(bounds) == 0: ...
> >
> > Obviously, bounds is not None, so it did not replace 1e12 or -1e12
> > into the bnds.
> >
> >
> > Could anyone please help? Thanks!
> >
> > My scipy version: 0.15.1; numpy version: 1.9.2. I am using Windows 64
> > bit, Python 3.4.
> >
> > Shawn
> >
> > --
> > Yuxiang "Shawn" Wang
> > Gerling Research Lab
> > University of Virginia
> > yw5aj at virginia.edu
> > +1 (434) 284-0836
> > https://sites.google.com/a/virginia.edu/yw5aj/
>
>
>
> --
> Yuxiang "Shawn" Wang
> Gerling Research Lab
> University of Virginia
> yw5aj at virginia.edu
> +1 (434) 284-0836
> https://sites.google.com/a/virginia.edu/yw5aj/
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