2010/11/24 Gael Varoquaux :
> On Tue, Nov 23, 2010 at 07:14:56PM +0100, Matthieu Brucher wrote:
>> > Jumping in a little late, but it seems that simulated annealing might
>> > be a decent method here: take random steps (drawing from a
>> > distribution of integer step sizes), reject steps that fall
I receive the following error when I try to import numpy
===
[node0]:/home/koojy/KMM> python2.6
Python 2.6.4 (r264:75706, Jul 26 2010, 16:55:18)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-10)] on linux2
Type "help", "copyright", "credits" or "licen
On Tue, Nov 23, 2010 at 07:14:56PM +0100, Matthieu Brucher wrote:
> > Jumping in a little late, but it seems that simulated annealing might
> > be a decent method here: take random steps (drawing from a
> > distribution of integer step sizes), reject steps that fall outside
> > the fitting range, a
On 23 November 2010 23:44, Pauli Virtanen wrote:
> On Tue, 23 Nov 2010 23:24:25 +0200, Stéfan van der Walt wrote:
> There's this on Python 3.2:
>
> ==
> ERROR: test_io.test_gzip_load
> -
On Tue, 23 Nov 2010 23:24:25 +0200, Stéfan van der Walt wrote:
> 2010/11/23 Stéfan van der Walt :
>> On Tue, Nov 23, 2010 at 9:28 AM, Nils Wagner
>> wrote:
>>> "/data/home/nwagner/local/lib/python2.5/site-packages/numpy/lib/npyio.py",
>>> line 66, in seek_gzip_factory
>>> g.name = f.name
>>> A
2010/11/23 Stéfan van der Walt :
> On Tue, Nov 23, 2010 at 9:28 AM, Nils Wagner
> wrote:
>> "/data/home/nwagner/local/lib/python2.5/site-packages/numpy/lib/npyio.py",
>> line 66, in seek_gzip_factory
>> g.name = f.name
>> AttributeError: GzipFile instance has no attribute 'name'
>
> This one i
==
Announcing Theano 0.3
==
This is an important release. The upgrade is recommended for everybody
using Theano 0.1. For those using the bleeding edge version in the
mercurial repository, we encourage you to update to the `0.3` tag.
This is the first major
2010/11/23 Zachary Pincus :
>
> On Nov 23, 2010, at 10:57 AM, Gael Varoquaux wrote:
>
>> On Tue, Nov 23, 2010 at 04:33:00PM +0100, Sebastian Walter wrote:
>>> At first glance it looks as if a relaxation is simply not possible:
>>> either there are additional rows or not.
>>> But with some technical
On Tue, 23 Nov 2010 16:39:13 +0100
Gerrit Holl wrote:
> 2010/11/23 Stéfan van der Walt :
>> On Tue, Nov 23, 2010 at 9:28 AM, Nils Wagner
>> wrote:
>>> "/data/home/nwagner/local/lib/python2.5/site-packages/numpy/lib/npyio.py",
>>> line 66, in seek_gzip_factory
>>> g.name = f.name
>>> Attribu
On Nov 23, 2010, at 10:57 AM, Gael Varoquaux wrote:
> On Tue, Nov 23, 2010 at 04:33:00PM +0100, Sebastian Walter wrote:
>> At first glance it looks as if a relaxation is simply not possible:
>> either there are additional rows or not.
>> But with some technical transformations it is possible to r
On Tue, Nov 23, 2010 at 04:33:00PM +0100, Sebastian Walter wrote:
> At first glance it looks as if a relaxation is simply not possible:
> either there are additional rows or not.
> But with some technical transformations it is possible to reformulate
> the problem into a form that allows the relaxa
On Tue, Nov 23, 2010 at 10:19:06AM -0500, josef.p...@gmail.com wrote:
> > I have a Nelder-Mead that seems to be working quite well on a few toy
> > problems.
> Assuming your function is well behaved, one possible idea is to try
> replacing the integer objective function with a continuous
> interpo
2010/11/23 Stéfan van der Walt :
> On Tue, Nov 23, 2010 at 9:28 AM, Nils Wagner
> wrote:
>> "/data/home/nwagner/local/lib/python2.5/site-packages/numpy/lib/npyio.py",
>> line 66, in seek_gzip_factory
>> g.name = f.name
>> AttributeError: GzipFile instance has no attribute 'name'
>
> This one i
On Tue, Nov 23, 2010 at 2:50 PM, Gael Varoquaux
wrote:
> On Tue, Nov 23, 2010 at 02:47:10PM +0100, Sebastian Walter wrote:
>> Well, I don't know what the best method is to solve your problem, so
>> take the following with a grain of salt:
>> Wouldn't it be better to change the model than modifying
On Tue, Nov 23, 2010 at 9:28 AM, Nils Wagner
wrote:
> "/data/home/nwagner/local/lib/python2.5/site-packages/numpy/lib/npyio.py",
> line 66, in seek_gzip_factory
> g.name = f.name
> AttributeError: GzipFile instance has no attribute 'name'
This one is mine--the change was made to avoid a depre
On Tue, Nov 23, 2010 at 8:50 AM, Gael Varoquaux
wrote:
> On Tue, Nov 23, 2010 at 02:47:10PM +0100, Sebastian Walter wrote:
>> Well, I don't know what the best method is to solve your problem, so
>> take the following with a grain of salt:
>> Wouldn't it be better to change the model than modifying
On Tue, Nov 23, 2010 at 02:47:10PM +0100, Sebastian Walter wrote:
> Well, I don't know what the best method is to solve your problem, so
> take the following with a grain of salt:
> Wouldn't it be better to change the model than modifying the
> optimization algorithm?
In this case, that's not poss
On Tue, Nov 23, 2010 at 11:43 AM, Gael Varoquaux
wrote:
> On Tue, Nov 23, 2010 at 11:37:02AM +0100, Sebastian Walter wrote:
>> >> min_x f(x)
>> >> s.t. lo <= Ax + b <= up
>> >> 0 = g(x)
>> >> 0 <= h(x)
>
>> > No constraints.
>
>> didn't you say that you operate only in some
On Tue, Nov 23, 2010 at 11:37:02AM +0100, Sebastian Walter wrote:
> >> min_x f(x)
> >> s.t. lo <= Ax + b <= up
> >> 0 = g(x)
> >> 0 <= h(x)
> > No constraints.
> didn't you say that you operate only in some convex hull?
No. I have an initial guess that allows me to specif
On Tue, Nov 23, 2010 at 11:17 AM, Gael Varoquaux
wrote:
> On Tue, Nov 23, 2010 at 11:13:23AM +0100, Sebastian Walter wrote:
>> I'm not familiar with dichotomy optimization.
>> Several techniques have been proposed to solve the problem: genetic
>> algorithms, simulated annealing, Nelder-Mead and Po
On Tue, Nov 23, 2010 at 11:13:23AM +0100, Sebastian Walter wrote:
> I'm not familiar with dichotomy optimization.
> Several techniques have been proposed to solve the problem: genetic
> algorithms, simulated annealing, Nelder-Mead and Powell.
> To be honest, I find it quite confusing that these alg
Hello Gael,
On Tue, Nov 23, 2010 at 10:27 AM, Gael Varoquaux
wrote:
> On Tue, Nov 23, 2010 at 10:18:50AM +0100, Matthieu Brucher wrote:
>> > The problem is that I can't tell the Nelder-Mead that the smallest jump
>> > it should attempt is .5. I can set xtol to .5, but it still attemps jumps
>> >
On Tue, Nov 23, 2010 at 10:18:50AM +0100, Matthieu Brucher wrote:
> > The problem is that I can't tell the Nelder-Mead that the smallest jump
> > it should attempt is .5. I can set xtol to .5, but it still attemps jumps
> > of .001 in its initial jumps.
> This is strange. It should not if the inti
> The problem is that I can't tell the Nelder-Mead that the smallest jump
> it should attempt is .5. I can set xtol to .5, but it still attemps jumps
> of .001 in its initial jumps.
This is strange. It should not if the intiial points are set
adequatly. You may want to check if the initial conditi
On Tue, Nov 23, 2010 at 08:21:55AM +0100, Matthieu Brucher wrote:
> optimize.fmin can be enough, I don't know it well enough. Nelder-Mead
> is not a constrained optimization algorithm, so you can't specify an
> outer hull.
I saw that, after a bit more reading.
> As for the integer part, I don't k
> Can you compare the speed of your cython solution with the version of Chuck
For multiple samples of the same distribution, it would do more or less
the same as the "searchsorted" method, so I don't expect any improvement
(except for being easier to find).
For multiple samples of different distr
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