<div dir="ltr"><div><div><div><div>Hello Ned,<br></div><div><br></div><div>See the scaling options at:<br><a href="https://www.coin-or.org/Ipopt/documentation/node43.html" target="_blank">https://www.coin-or.org/Ipopt/<wbr>documentation/node43.html</a><br></div>The default is "gradient-based".</div><div><br></div>You can change that by specifying an option with something like:<br>_app = new Ipopt::IpoptApplication();<br>_app->Options()-><wbr>SetStringValue("nlp scaling method", "none");<br><br></div>Best regards,<br></div>João Leal</div><div class="gmail_extra"><br><div class="gmail_quote">2017-12-08 15:34 GMT+00:00 Nedialkov, Ned <span dir="ltr"><<a href="mailto:nedialk@mcmaster.ca" target="_blank">nedialk@mcmaster.ca</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Hi All,<br>
<br>
It seems hard to figure out if the C/C++ version of IPOPT does any automatic scaling of the variables.<br>
This was ISCALE 3 and 4 in the Fortran version.<br>
<br>
So my question is, is there any automatic scaling of variables, and if not, is there a way to<br>
turn such a feature on?<br>
<br>
Regards,<br>
Ned Nedialkov<br>
<br>
<br>
<br>
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