[Scipy-tickets] [SciPy] #1235: scipy.optimize.leastsq MemoryError

SciPy Trac scipy-tickets@scipy....
Fri Jul 16 10:09:51 CDT 2010


#1235: scipy.optimize.leastsq MemoryError
-----------------------------------------------+----------------------------
 Reporter:  matador                            |       Owner:  somebody
     Type:  defect                             |      Status:  new     
 Priority:  normal                             |   Milestone:  0.9.0   
Component:  scipy.optimize                     |     Version:  0.7.0   
 Keywords:  MemoryError large Jacobian Matrix  |  
-----------------------------------------------+----------------------------

Comment(by charris):

 I've done bigger problems using numerical derivatives, but the devil is in
 the details. There may be a memory leak somewhere, not necessarily in the
 leastsq code. Can you try to pin things down a bit more? What happens if
 you don't supply the derivative? Also, five iterations for 36 GB is about
 7GB/iteration, which is pretty big compared to the size of the problem
 itself. What happens if you call your own Dfun and f(x) a couple of times?

 I think the mailing list would be a better place to start on this problem
 since you don't supply enough info and not everyone tracks the bug list.

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1235#comment:1>
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