[SciPy-user] Bug in optimize.leastsq when Jacobian matrix is provided

Andrew Straw strawman at astraw.com
Thu Jun 23 10:59:28 CDT 2005


Hi Abhiman,

Can you provide a simple script which demonstrates the problem?  People 
will be able to help you much more easily this way.

Cheers!
Andrew

On Jun 23, 2005, at 7:26 AM, Abhiman Chatra wrote:

> Hi,
>
>  I am new to Python, SciPy and optimization. So excuse me if I have 
> make mistakes.
>
> My Problem :
>  -------------------
>  I want to use optimize.leastsq function of scipy to find a least 
> square fit. But my function in the parametric form is quite 
> complicated. Hence I want to provide the Jacobian matrix to the 
> leastsquare optimizer to improve its performance. But when I provide 
> the function for calculating the Jacobian matrix, I get a windows 
> error saying "python.exe has generated errors and will be closed by 
> Windows. You will need to restart the program. An error log is being 
> created <OK>"
>
>  Since this error cannot be caught I cannot trace the cause of this 
> error. But my feeling is that this is some memory error. This error is 
> not reproducible if I do not provide the function for calculating the 
> Jacobian matrix.
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