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function opout = FA_SUB(in1,in2)
// function opout = FA_SUB(in1,in2)
// -----------------------------------------------------------------
// Subtraction function for Function Annotations.
//
// Input data:
// in1: string specifying a number or a symbol.
// in2: string specifying a number or a symbol.
//
// Output data:
// opout: string containing the computed result.
//
// Status:
// 26-Oct-2007 -- Raffaele Nutricato: Author.
// 26-Oct-2007 -- Alberto Morea: Test Ok.
//
// Copyright 2007 Raffaele Nutricato & Alberto Morea.
// Contact: raffaele.nutricato@tiscali.it
// -----------------------------------------------------------------
// ------------------------------
// --- Check input arguments. ---
// ------------------------------
SCI2CNInArgCheck(argn(2),2,2);
// ------------------------
// --- Generate Output. ---
// ------------------------
if (isnum(in1) & isnum(in2))
in1num = eval(in1);
in2num = eval(in2);
outnum = in1num-in2num;
if isnan(outnum)
opout = '__SCI2CNANSIZE';
else
opout = string(outnum);
end
else
opout = '('+string(in1)+'-'+string(in2)+')';
end
endfunction
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