[Octave-bug-tracker] [bug #60018] residmin_stat gives error when some variables are flagged as fixed. The function worked properly in 5.1.0.

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?60018>

                 Summary: residmin_stat gives error when some variables are
flagged as fixed. The function worked properly in 5.1.0.
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Sun 07 Feb 2021 02:25:25 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: Daniel
        Originator Email: sdannyp@campus.technion.ac.il
             Open/Closed: Open
                 Release: 6.1.0
         Discussion Lock: Any
        Operating System: Microsoft Windows

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Details:

#Input:
if (~exist('nonlin_residmin', 'file'))
  pkg load optim;
endif

x = [1, 2, 3, 4]';
y = [5.2, 6.9, 8.6, 11.5]';
f = @(x, a) a(1)*x + a(2);
fixed = [false, true]';
p0 = [1, 3]';
r = @(a) (y - f(x, a));
fitparams = nonlin_residmin(r, p0, optimset('fixed', fixed));
stat = residmin_stat(r, fitparams, struct('objf_type', 'wls', 'ret_covp',
true, 'fixed', fixed));

#Output
error: can't perform indexed assignment for function handle type
error: called from
    __residmin_stat__ at line 369 column 14
    residmin_stat at line 76 column 7
    fitting_test_610 at line 12 column 6




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