[Ipopt] variable scaling

[João Leal]

Hello Ned,

See the scaling options at:
https://www.coin-or.org/Ipopt/documentation/node43.html
The default is "gradient-based".

You can change that by specifying an option with something like:
_app = new Ipopt::IpoptApplication();
_app->Options()->SetStringValue("nlp scaling method", "none");

Best regards,
João Leal

2017-12-08 15:34 GMT+00:00 Nedialkov, Ned <nedialk at mcmaster.ca>:

>
> Hi All,
>
> It seems hard to figure out if the C/C++ version of IPOPT does any
> automatic scaling of the variables.
> This was ISCALE 3 and 4 in the Fortran version.
>
> So my question is, is there any automatic scaling of variables, and if
> not, is there a way to
> turn such a feature on?
>
> Regards,
> Ned Nedialkov
>
>
>
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