Hi all, I'm glad to inform you about new OpenOpt Suite release 0.42 (2012-Sept-15), a free Python-written cross-platform software with primal focus on numerical optimization. Main changes:

  • Some improvements for solver interalg, including handling of categorical variables
  • Some parameters for solver gsubg
  • Speedup objective function for de and pswarm on FuncDesigner models
  • New global (GLP) solver: asa (adaptive simulated annealing)
  • Some new classes for network problems: TSP (traveling salesman problem), STAB (maximum graph stable set)], MCP (maximum clique problem)
  • Improvements for FD XOR (and now it can handle many inputs)
  • Solver de has parameter "seed", also, now it works with PyPy
  • Function sign now is available in FuncDesigner
  • FuncDesigner interval analysis (and thus solver interalg) now can handle non-monotone splines of 1st order
  • FuncDesigner now can handle parameter fixedVars as Python dict
  • Now scipy InterpolatedUnivariateSpline is used in FuncDesigner interpolator() instead of UnivariateSpline. This creates backward incompatibility - you cannot pass smoothing parameter (s) to interpolator no longer.
  • SpaceFuncs: add Point weight, Disk, Ball and method contains(), bugfix for importing Sphere, some new examples
  • Some improvements (essential speedup, new parameter interpolate for P()) for our (currently commercial) FuncDesigner Stochastic Programming addon
  • Some bugfixes

In our website you could vote for most required OpenOpt Suite development direction(s) (poll has been renewed, previous results are here).

Regards, D.

asked 15 Sep '12, 07:01

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Dmitrey
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edited 20 Dec '13, 06:19

Site administrators, spam filter hided the post information, could you fix it?

(15 Sep '12, 07:03) Dmitrey
1

It's not spam filter, there are currently issues with posting web links directly, see my edit.

(15 Sep '12, 07:14) Bo Jensen ♦

hi all,

I'm glad to inform you about new OpenOpt release 0.43 (2012-Dec-15):

  • interalg now can solve SNLE in 2nd mode (parameter dataHandling = "raw", before - only "sorted")
  • Many other improvements for interalg
  • Some improvements for FuncDesigner kernel
  • FuncDesigner ODE now has 3 arguments instead of 4 (backward incompatibility!), e.g. {t: np.linspace(0,1,100)} or mere np.linspace(0,1,100) if your ODE right side is time-independend
  • FuncDesigner stochastic addon now can handle some problems with gradient-based NLP/NSP solvers
  • Many minor improvements and some bugfixes

Visit openopt.org for more details.

Regards, D.

link

answered 15 Dec '12, 10:22

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Dmitrey
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edited 15 Dec '12, 14:08

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fbahr ♦
4.6k716

I'm glad to inform you about new OpenOpt Suite release 0.45 (2013-March-15):

  • Essential improvements for FuncDesigner interval analysis (thus affect interalg)
  • Temporary walkaround for a serious bug in FuncDesigner automatic differentiation kernel due to a bug in some versions of Python or NumPy, may affect optimization problems, including (MI)LP, (MI)NLP, TSP etc
  • Some other minor bugfixes and improvements

Regards, D.

link

answered 15 Mar '13, 09:30

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Dmitrey
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I'm glad to inform you about new OpenOpt Suite release 0.50 (2013-June-15):

interalg (solver with specifiable accuracy) now works many times (sometimes orders) faster on (possibly multidimensional) integration problems (IP) and on some optimization problems

Add modeling dense (MI)(QC)QP in FuncDesigner (alpha-version, rendering may work slowly yet)

Bugfix for cplex wrapper

Some improvements for FuncDesigner interval analysis (and thus interalg)

Add FuncDesigner interval analysis for tan in range(-pi/2,pi/2)

Some other bugfixes and improvements

(Proprietary) FuncDesigner stochastic addon now is available as standalone pyc-file, became available for Python3 as well

Regards, Dmitrey.

link

answered 15 Jun '13, 11:12

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Dmitrey
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edited 15 Jun '13, 11:14

Hi all,

new OpenOpt suite v 0.51 (free software written in Python language) has been released:

Some improvements for  FuncDesigner  automatic differentiation and QP

FuncDesigner now can model sparse (MI)(QC)QP

Octave QP solver has been connected

MATLAB solvers linprog (LP), quadprog (QP), lsqlin (LLSP), bintprog (MILP)

New NLP solver: knitro

Some elements of 2nd order interval analysis, mostly for interalg

Some interalg improvements

interalg can directly handle (MI)LP and (possibly nonconvex) (MI)(QC)QP

New classes: knapsack problem (KSP), bin packing problem (BPP), 
dominating set problem (DSP)

FuncDesigner can model SOCP

SpaceFuncs  has been adjusted for recent versions of Python and NumPy

visit http://openopt.org for more details.

Regards, D.

link

answered 15 Sep '13, 08:11

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Dmitrey
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accept rate: 0%

BTW : I think it's a good idea to keep announcements in same thread as you do now, since people can then just unfollow the thread once and that way filter the announcements they want.

(15 Sep '13, 08:35) Bo Jensen ♦

Hi all,

I'm glad to inform you about new OpenOpt Suite release 0.52 (2013-Dec-15):

Some interalg speedup
oofun expression
MATLAB solvers fmincon and fsolve have been connected
Several MATLAB ODE solvers have been connected
New ODE solvers, parameters abstol and reltol
New GLP solver: direct
Some minor bugfixes and improvements

Visit http://openopt.org for more details. Regards, Dmitrey.

link

answered 20 Dec '13, 06:17

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Dmitrey
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Asked: 15 Sep '12, 07:01

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