[SciPy-dev] scipy.optimize.nonlin.broyden2

Ondrej Certik ondrej@certik...
Thu Mar 20 07:46:09 CDT 2008


On Thu, Mar 20, 2008 at 1:45 PM, Ondrej Certik <ondrej@certik.cz> wrote:
> On Thu, Mar 20, 2008 at 4:11 AM, argriffi <argriffi@ncsu.edu> wrote:
>  > Hi Ondrej,
>  >
>
> >  As requested I have attached a modification and a test case.  The
>  >  modification checks a value for equality to zero, but maybe it should
>  >  more appropriately handle values near zero.  Also, other functions in
>  >  nonlin.py may benefit from similar modifications.
>
>  Excellent, thanks a lot for the work. Here are my comments:
>
>
>                denominator = norm(deltaFxm)**2
>                if not denominator:
>                    break
>
>  use abs(denominator) < eps
>
>  and define eps as a default parameter of the function, for example eps=1e-10.
>
>  Also could you please apply this into the scipy svn, and send use the

use -> us

>  output of "svn di"? So that someone with a svn access can just take it
>  and apply it.
>
>  As to the tests, please add them to
>  scipy/optimize/tests/test_nonlin.py. Simply do all of this in your
>  local svn copy and send use the result of "svn di".

use -> us.

O.


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