[Octave-bug-tracker] [bug #64508] [octave forge] (optim) lsqcurvefit error from jacobian output

[Liang Tang]

URL:
  <https://savannah.gnu.org/bugs/?64508>

                 Summary: [octave forge] (optim)  lsqcurvefit error from
jacobian output 
                   Group: GNU Octave
               Submitter: lt1234
               Submitted: Wed 02 Aug 2023 07:21:55 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: lt1234
        Originator Email: 
             Open/Closed: Open
                 Release: 8.2.0 8.X Series Bug Fix Release 
         Discussion Lock: Any
        Operating System: Microsoft Windows
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Wed 02 Aug 2023 07:21:55 PM UTC By: Liang Tang <lt1234>
Jacobian output caused an error message. 

Example: 

xdata=(pi/2)*[-1 -1/2 0 1/2 1]'; 
ydata=cos(xdata); 
x0=0; 
fun=@(x,xdata) x*cos(xdata);  
[x, resnorm, residual, exitflag, output, lambda]=lsqcurvefit (fun, x0, xdata,
ydata)
[x, resnorm, residual, exitflag, output, lambda, jacobian]=lsqcurvefit (fun,
x0, xdata, ydata)

Outputs from the first call: 

x = 1.0000
resnorm = 6.6566e-23
residual =

  -3.5325e-28
  -4.0794e-12
  -5.7692e-12
  -4.0794e-12
  -3.5325e-28

exitflag = 3
output =

  scalar structure containing the fields:

    iterations = 4

lambda = [](0x0)


Error message from the 2nd call: 

error: 'settings' undefined near line 309, column 37
error: called from
    lsqcurvefit at line 308 column 10







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