[Octave-bug-tracker] [bug #55742] Related to bug #41888, fix not quite working yet-- crashes at the very end of the search.

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?55742>

                 Summary: Related to bug #41888, fix not quite working yet--
crashes at the very end of the search.
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 20 Feb 2019 04:21:48 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: AlanStr
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.1
        Operating System: Any

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Details:

It is wonderful that you acted on bug #41888 and added the matlab feature to
fminsearch, where you can pass additional parameters to the function that can
then be passed through fminsearch as additional arguments at the end of the
call.

My application is quite complex, but here I have boiled it down to a fairly
short example.

Main script file, which I called fminsearchBugTest1


% We will minimize the function f(x)=2+(x-2.0)^2+(y-3.0)^2
% but we will pass the 2.0 and 3.0 through an additional
% parameter called dataStructure.

dataStructure{1}=2.0;
dataStructure{2}=3.0;

beta0=[1.5 2.8];

[beta,fval] = fminsearch('fminsearchBugTestFunction',beta0, ...
  
optimset('TolX',1e-6,'TolFun',1e-6,'Display','iter','MaxIter',20000,'MaxFunEvals',40000),dataStructure);



Next we define the function that we will minimize. I called it
fminsearchBugTestFunction:




function [s]=fminsearchBugTestFunction(beta, dataStructure)
  %dataStructure is a paramter of the function

  s=2.0+(beta(1)-dataStructure{1})^2+(beta(2)-dataStructure{2})^4;

  fprintf('%9.6f\t%9.6f\n',beta);

endfunction



Test this in Release 4.4.1. For me it shows the search proceeding all the way
to the end, and then at the end it crashes and reports


error: 'dataStructure' undefined near line 3 column 18
error: called from
    fminsearchBugTestFunction at line 3 column 4
    fminsearch at line 105 column 10
    fminsearchBugTest1 at line 10 column 12





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File Attachments:


-------------------------------------------------------
Date: Wed 20 Feb 2019 04:21:48 AM UTC  Name: fminsearchBugTest1.m  Size: 797B 
 By: None

<http://savannah.gnu.org/bugs/download.php?file_id=46309>
-------------------------------------------------------
Date: Wed 20 Feb 2019 04:21:48 AM UTC  Name: fminsearchBugTestFunction.m 
Size: 223B   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=46310>

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