Option for ipopt

[liuyibing]

Hello johan

I have installed the YALMIP and OPTI toolbox with ipopt, but the option for ipopt is invalid, is there a bug?

thank you!

[Johan Löfberg]

in what sense?

[liuyibing]

thank you. For example, when I use the folowing command “ops=sdpsettings('solver','ipopt','ipopt.jac_c_constant','yes','verbose',2,'usex0',1,'cachesolvers',1,'showprogress',1);

”

Besides，all the option of IPOPT are invalid, I am doubt whtherthere is a bug between the OPTI interface and IPOPT?

[Johan Löfberg]

But what do you mean with invalid? Does something crash, or is something not communicated to IPOPT or what are you trying to say?

The options which can be communicated to the IPOPT interface are

K>> options.ipopt
ans =
            nlp_scaling_method: 'gradient-based'
                jac_c_constant: 'no'
                jac_d_constant: 'no'
              hessian_constant: 'no'
            mehrotra_algorithm: 'no'
                   mu_strategy: 'adaptive'
                     mu_oracle: 'quality-function'
                     mu_target: 0
                       max_soc: 4
         hessian_approximation: 'limited-memory'
    limited_memory_max_history: 6
               derivative_test: 'none'
                 linear_solver: 'ma57'
                   print_level: 3

[liuyibing]

A simple example is tested by me:

x=sdpvar(1,1);

obj=x*x;

con=[];

con=con+[x<=3];

ops=sdpsettings('solver','ipopt','ipopt.print_level',3,'verbose',2,'debug',1);

sol=solvesdp(con,obj,ops);

if sol.problem == 0

    sol.info

    X = double(x)

    O=double(obj)

else

    display('Hmm, something went wrong!');

    sol.info

    yalmiperror(sol.problem)

end

when I run this progam, the following error:

Error using sdpsettings (line

1628)

Unrecognized property name

'ipopt.print_level'.

Error in solvertest (line 5)

ops=sdpsettings('solver','ipopt','ipopt.print_level',3,'verbose',2,'debug',1);

I use the OPTI-ipopt whcih you recommend, are there some bugs with my OPTI?

[liuyibing]

[Johan Löfberg]

Aha. All print levels are controlled using the general YALMIP option 'verbose'. YALMIP will set print_level as print_level = 2+verbose

[liuyibing]

Not only the "print_level",but also all the propertys in ipopt option can not be recognized by yalmip, could you give me some advice?

[Johan Löfberg]

Found the bug.

Until fixed, simlpy accses the options directly

ops = sdpsettings;
ops.ipopt.someoption = value.