topic Re: PROC NLP INITIALIZING VALUES in Mathematical Optimization, Discrete-Event Simulation, and OR

PROC NLP INITIALIZING VALUES

sarrabeny — Wed, 26 Jan 2022 20:58:45 GMT

Hello everyone,

I would like to initialize the values of my parameters of my proc nlp, by picking them from a table. My table nr has two variables x1 and x2, with one value for each. My objective function is a function that I have defined in a previous proc fcmp.

I have tried to run this code, but it can't seem to work, I have the following error message: Missing variable TYPE on the INEST= input data set.

proc nlp tech=NEWRAP invar=two(type=PARMS) gradcheck=detail gconv2=1e-12 ;
min f;
decvar x1 x2;
f = (1-x1)*2+100(x2-x1*2)*2;
run;

Thanks a lot for your help!

Re: PROC NLP INITIALIZING VALUES

sbxkoenk — Thu, 27 Jan 2022 20:52:12 GMT

Hello,

I have moved your question to this board:

Mathematical Optimization, Discrete-Event Simulation, and OR
Operations Research topics: SAS/OR,
SAS Optimization, and SAS Simulation Studio

I see now it's a duplicate of another question that is already posted in this board.

Cheers,

Koen

Re: PROC NLP INITIALIZING VALUES

Rick_SAS — Fri, 28 Jan 2022 11:50:32 GMT

@sarrabeny and @CerditoSalvaje
You both posted the same question. Could you please let us know if you are taking a course? If so, what is the topic of the course?

If you post a homework question or a question about a school project, please let us know. That way we can give hints that lead you towards discovering the answers on your own. This is more valuable than telling you an answer.

Re: PROC NLP INITIALIZING VALUES

CerditoSalvaje — Fri, 28 Jan 2022 11:56:08 GMT

Hello Rick, not at all. We are friends and we are trying to code PSO in SAS, together. She had the question I have post but she hasn’t a SAS account, then she has created one. After, we don’t know why, she has received a message as if their question was moved into spam. Then, she asked me to post it for her.

Thanks and sorry for the confusion, she is not very used with the forum.

Re: PROC NLP INITIALIZING VALUES

sbxkoenk — Fri, 28 Jan 2022 12:09:06 GMT

Hello,

Thanks for clarifying.

PSO ... do you mean particle swarm optimization?

Why are you using the legacy procedure PROC NLP by the way?

I think you should shift to our more modern procedures and solvers (PROC OPTMODEL, PROC OPTLSO, ...).

OPTMODEL also has a great algebraic modelling language (AML) to formulate your mathematical program.

Thanks,

Koen

Re: PROC NLP INITIALIZING VALUES

Rick_SAS — Fri, 28 Jan 2022 12:16:51 GMT

Yes. The request to use the ancient PROC NLP was one reason I thought the question was related to a course. Sometimes professors reuse old assignments from 20 years ago.

I agree with Koen: If you are doing new work in SAS, use the most modern techniques. Instead of PROC NLP, use PROC OPTMODEL.

topic Re: PROC NLP INITIALIZING VALUES in Mathematical Optimization, Discrete-Event Simulation, and OR

PROC NLP INITIALIZING VALUES

Re: PROC NLP INITIALIZING VALUES

Mathematical Optimization, Discrete-Event Simulation, and OROperations Research topics: SAS/OR,SAS Optimization, and SAS Simulation Studio

Re: PROC NLP INITIALIZING VALUES

Re: PROC NLP INITIALIZING VALUES

Re: PROC NLP INITIALIZING VALUES

Re: PROC NLP INITIALIZING VALUES

Mathematical Optimization, Discrete-Event Simulation, and OR
Operations Research topics: SAS/OR,
SAS Optimization, and SAS Simulation Studio