RE: PACKAGE OPTIM - fmincon

[steph]

Thanks Olaf

The documentation actually states that that those must be column vectors,
see https://octave.sourceforge.io/optim/function/fmincon.html

I have now made sure that mine are column vectors but I still get same
message, therefore I have changed my code to use nonlin_min, but I want to
maintain Matlab compatibility to avoid two sets of code. I am new at Octave
and I love Octave.

And to be complete, I use Octave 5.2 on Win10 and optim is version 1.6.0.

Steph


-----Original Message-----
From: Olaf Till <address@hidden> 
Sent: Saturday, 15 February 2020 12:54
To: address@hidden
Cc: address@hidden
Subject: Re: PACKAGE OPTIM - fmincon

On Fri, Feb 14, 2020 at 01:55:49PM +0200, address@hidden wrote:
> I have the following function works in Matlab, but not in Octave, the 
> error message is
> 
> error: lbound: wrong dimensions
> 
> error: called from
> 
>     __apply_param_config_vectors__ at line 37 column 11
> 
>     fmincon at line 311 column 5
> 
> I have tried  transpose of lower bound, i.e.   x0_lb = [-100,0]' but then
> same message, except that upper bound now has wrong dimension, then I 
> took transpose of X0_ub and message reverts back to lower bound has 
> wrong dimension.

The 'fmincon' in Octaves optim package requires x0, x0_lb, and x0_ub to be
column vectors. This is probably a bug, since Matlabs 'fmincon'
seems to accept arbitrary arrays at least for x0. You may want to file a bug
report so I don't forget to deal with the issue.

Olaf

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