[Scipy-tickets] [SciPy] #984: curve_fit does not work without shifting data.

SciPy Trac scipy-tickets@scipy....
Tue Feb 9 14:04:32 CST 2010

#984: curve_fit does not work without shifting data.
 Reporter:  pschella                    |       Owner:  somebody
     Type:  defect                      |      Status:  new     
 Priority:  normal                      |   Milestone:  0.8.0   
Component:  scipy.optimize              |     Version:  devel   
 Keywords:  curve_fit, minpack, robust  |  

Comment(by josefpktd):

 with higher error codes the covariance matrix might not be available see

 one possibility when this change is made: issue a warning and return
 cov=None, after checking for a valid covariance to avoid the exception of

Ticket URL: <http://projects.scipy.org/scipy/ticket/984#comment:2>
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