/usr/share/SBMLToolbox/Simulation/GetArgumentsFromLambdaFunction.m is in sbmltoolbox 4.1.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | function Elements = GetArgumentsFromLambdaFunction(OriginalFormula)
% elements = GetArgumentsFromLambdaFunction(formula)
%
% Takes
%
% 1. formula, a string representation of a math expression that contains the MathML lambda function 
% 
% Returns 
%
% 1. an array of the components of the lambda function
%
% *EXAMPLE:*
%
%           elements = GetArgumentsFromLambdaFunction('lambda(x, x+0.5)')
%
%                    =  'x'  'x+0.5'   
%
%           elements = GetArgumentsFromLambdaFunction('lambda(x, y, x + y)')
%
%                    =  'x'  'y'    'x+y'   
%<!---------------------------------------------------------------------------
% This file is part of SBMLToolbox.  Please visit http://sbml.org for more
% information about SBML, and the latest version of SBMLToolbox.
%
% Copyright (C) 2009-2012 jointly by the following organizations: 
%     1. California Institute of Technology, Pasadena, CA, USA
%     2. EMBL European Bioinformatics Institute (EBML-EBI), Hinxton, UK
%
% Copyright (C) 2006-2008 jointly by the following organizations: 
%     1. California Institute of Technology, Pasadena, CA, USA
%     2. University of Hertfordshire, Hatfield, UK
%
% Copyright (C) 2003-2005 jointly by the following organizations: 
%     1. California Institute of Technology, Pasadena, CA, USA 
%     2. Japan Science and Technology Agency, Japan
%     3. University of Hertfordshire, Hatfield, UK
%
% SBMLToolbox is free software; you can redistribute it and/or modify it
% under the terms of the GNU Lesser General Public License as published by
% the Free Software Foundation.  A copy of the license agreement is provided
% in the file named "LICENSE.txt" included with this software distribution.
%----------------------------------------------------------------------- -->
OriginalFormula = LoseWhiteSpace(OriginalFormula);
OpeningBracketIndex = find((ismember(OriginalFormula, '(')) == 1);
ClosingBracketIndex = find((ismember(OriginalFormula, ')')) == 1);
CommaIndex = find((ismember(OriginalFormula, ',')) == 1);
%pair the brackets
Pairs = PairBrackets(OriginalFormula);
Start = findstr(OriginalFormula, 'lambda');
if ((length(Start) ~= 1) || (Start ~= 1))
    error ('lambda either does not occur or cannot be dealt with');
end;
% find commas between arguments of lambda
for i = 1:length(CommaIndex)
    for j = 2:length(OpeningBracketIndex)
        if ((CommaIndex(i) > Pairs(j,1)) && (CommaIndex(i) < Pairs(j,2)))
            CommaIndex(i) = 0;
        end;
    end;
end;
NonZeros = find(CommaIndex ~= 0);
% get elements that represent the arguments of the lambda expression
% as an array of character arrays
% e.g. first element is between opening bracket and first relevant comma
%      next elements are between relevant commas
%      last element is between last relevant comma and closing bracket
j = Pairs(1, 1);
ElementNumber = 1;
for i = 1:length(NonZeros)
    element = '';
    j = j+1;
    while (j <= CommaIndex(NonZeros(i)) - 1)
        element = strcat(element, OriginalFormula(j));
        j = j + 1;
    end;
    Elements{ElementNumber} = element;
    ElementNumber = ElementNumber + 1;
end;
element = '';
j = j+1;
while (j < Pairs(1, 2))
    element = strcat(element, OriginalFormula(j));
    j = j + 1;
end;
Elements{ElementNumber} = element;
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