Select the number of variables

[NicolasL-S]

Hi, I've been using CUTEst.jl for some weeks, it works great. But I have one issue. Most CUTEst problems have a variable number of variables. But after searching everywhere, I can't figure out whether we can change it when calling CUTEstModel(). Is it possible? Thanks for the great work.

[abelsiqueira]

Hi @NicolasL-S, thanks for using CUTEst.jl. It should be possible to specify the values of parameters by passing additional arguments, e.g.,

nlp = CUTEstModel("DIXMAANJ", "-param", "M=30")

These arguments are passed to the sifdecoder call. I do believe you will still need to verify the parameter and how it affects the number of variables looking into the .SIF file, but @dpo might correct me.

[dpo]

It's a bit hidden in the documentation.

Asking for help at the Julia prompt

?help sifdecoder

should also reveal the same example.

Admittedly, it should be more visible.

You may be able to call CUTEst.sifdecoder("DIXMAANJ", "-show") to see a list of allowed parameter values (I haven't checked). In general, as @abelsiqueira said, you still have to look in the SIF file. That should definitely be improved.

[NicolasL-S]

Thanks a lot for the two very quick replies which perfectly solved my problem. As always, great support from the welcoming Julia community.