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diff --git a/macros/FunctionAnnotation/FA_MAX.sci b/macros/FunctionAnnotation/FA_MAX.sci
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+++ b/macros/FunctionAnnotation/FA_MAX.sci
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+function opout = FA_MAX(in1,in2)
+// function opout = FA_MAX(in1,in2)
+// -----------------------------------------------------------------
+// Maximum function for Function Annotations.
+// When in1 and in2 are both symbols this function returns
+// in1.
+//
+// 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 2008 Raffaele Nutricato & Alberto Morea.
+// Contact: raffaele.nutricato@tiscali.it
+// -----------------------------------------------------------------
+
+// ------------------------------
+// --- Check input arguments. ---
+// ------------------------------
+SCI2CNInArgCheck(argn(2),2,2);
+
+// ------------------------
+// --- Generate Output. ---
+// ------------------------
+if (isnum(in1))
+   in1num = eval(in1);
+   if (isnum(in2))
+      in2num = eval(in2);
+      outnum = max(in1num,in2num);
+      if isnan(outnum)
+         opout  = '__SCI2CNANSIZE';
+      else
+         opout  = string(outnum);
+      end
+   else
+      if (in1num == 1)
+         opout  = string(in2);
+      end
+   end
+else
+   opout  = string(in1);
+end
+
+endfunction