[Octave-bug-tracker] [bug #40889] fzero ignores input option "OutputFcn"

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?40889>

                 Summary: fzero ignores input option "OutputFcn"
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Fri 13 Dec 2013 04:22:06 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Leo
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.6.4
        Operating System: GNU/Linux

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Details:

The following two invocations of fzero produce the same result:


[f0,fval,info, output] = fzero(  @(x)besselj(1,x) , [3 5])



[f0,fval,info, output] = fzero(  @(x)besselj(1,x) , [3 5],
optimset("OutputFcn", @sin))


showing that fzero ignores the function handle passed for the "OutputFcn"
option (in the above the function "sin" is used only as an example; in real
uses a properly behaving function will be used).

The expected behaviour can be recovered by changing the line 308 of fzero as
follows:

from:


    if (outfcn)


to:


    if !isempty(outfcn)


Best regards,
Leo




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