[ADOL-C] extra arguments

Kshitij Kulshreshtha kshitij at math.upb.de
Wed Feb 29 03:02:25 EST 2012


Hello,

the only way to change passive parameters is to retrace the whole
function computation. These are hardwired constants as far as ADOL-C are
concerned once tracing was completed.

Regards
Kshitij.

As on 2012-02-28 17:11, Alfonso Callejo did write:
> Hello everyone,
> 
> This might be a basic question.
> Let y=f(x, /extra_arguments/) be the function I want to differentiate,
> being y of length m and x of size n.
> The expression for the Jacobian matrix, once the tape has been
> appropriately generated, is: returnValue = jacobian(tag, m, n, x, DyDx);
> Assume the /extra_arguments /are extra passive arguments that take part
> in the computation of y but which don't belong to the vector of
> independent variables x. Provided the value of the /extra_arguments/ has
> changed and I want to re-evaluate the Jacobian matrix, how am I supposed
> to provide them to the Jacobian driver?
> Thanks a lot.
> 
> Regards,
> Alfonso
> 
> 
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-- 
Dr. Kshitij Kulshreshtha

Institut für Mathematik,
Universität Paderborn,
Warburger Straße 100,
33098 Paderborn.

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