[Scipy-tickets] [SciPy] #1624: leastsq example in tutorial/optimize is sensitive to random.seed

SciPy Trac scipy-tickets@scipy....
Wed Mar 21 15:01:30 CDT 2012


#1624: leastsq example in tutorial/optimize is sensitive to random.seed
----------------------------+-----------------------------------------------
  Reporter:  denis          |       Owner:  somebody        
      Type:  review         |      Status:  closed          
  Priority:  low            |   Milestone:  Unscheduled     
 Component:  Documentation  |     Version:  0.10.0          
Resolution:  invalid        |    Keywords:  leastsq tutorial
----------------------------+-----------------------------------------------
Changes (by pv):

  * status:  new => closed
  * resolution:  => invalid
  * component:  scipy.optimize => Documentation


Comment:

 It's local minima -- illustration attached (for simplified problem with 2
 parameters only).

 I don't think there's anything to fix here --- maybe the example problem
 could be replaced with a stabler one, or one could write something about
 local minima in optimization when discussing global optimizers.
 Contributions are welcome!

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1624#comment:1>
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