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danaaesch
‎10-29-2019
  • 5 Posts
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Re: IML. nlptr. An 'error' of -5 shouldn't be printed to the log

by Fluorite | Level 6 in SAS/IML Software and Matrix Computations
‎10-26-2019 09:23 PM
‎10-26-2019 09:23 PM
Thanks Rick and team, we were finally able to solve this problem by switching optimizers. We had been using nlpntr and switched to nlpnms.  ... View more

Re: IML. nlptr. An 'error' of -5 shouldn't be printed to the log

by Fluorite | Level 6 in SAS/IML Software and Matrix Computations
‎10-22-2019 06:03 PM
‎10-22-2019 06:03 PM
Thanks for the concise, easy algorithm for testing if my response surface is flat. But couldn't your software already be applying that algorithm? And so returning meaningful RCs and accompanying messages? But unfortunately I'm pretty sure that's not my problem.  ... View more

Re: IML. nlptr. An 'error' of -5 shouldn't be printed to the log

by Fluorite | Level 6 in SAS/IML Software and Matrix Computations
‎10-22-2019 12:14 PM
‎10-22-2019 12:14 PM
Well, I'd certainly regard nonconvergence as a problem. My issue is rather that the grid search has already found a good solution that is within the default (stringent)  criteria for the termination criterion. Why should  this be reported to the log as an error? ... View more

Re: IML. nlptr. An 'error' of -5 shouldn't be printed to the log

by Fluorite | Level 6 in SAS/IML Software and Matrix Computations
‎10-22-2019 11:47 AM
‎10-22-2019 11:47 AM
Thanks Rick. Hmmm...strange that it was developed this way as I guess this is a common frustration. ... View more

IML. nlptr. An 'error' of -5 shouldn't be printed to the log

by Fluorite | Level 6 in SAS/IML Software and Matrix Computations
‎10-22-2019 10:51 AM
‎10-22-2019 10:51 AM
Hi. I'm calling nlptr in IML after having run a grid search for initial values to give to nlptr. The grid search is good so that it's often the case that nlptr can't improve on the initial values. In these cases, I don't want to have : ERROR: TRUREG Optimization cannot be completed. WARNING: Optimization routine cannot improve the function value. printed to the log. It's not an error. This is part of a big program used by many people in our organization so I can't just say "Turn your notes off." ... View more
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