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diff --git a/macros/FunctionAnnotation/FA_SZ_ROW_COLUMN.sci b/macros/FunctionAnnotation/FA_SZ_ROW_COLUMN.sci
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+++ b/macros/FunctionAnnotation/FA_SZ_ROW_COLUMN.sci
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+function opoutsize = FA_SZ_ROW_COLUMN(in1size,in2size)
+// function opoutsize = FA_SZ_OPPLUSA(in1size,in2size)
+// -----------------------------------------------------------------
+// Returns the size of the output computed by OPPLUS operator 
+// restricted to arithmetic operations (string operations not supported.)
+// 
+// Assuming:
+// size(in1) = [in1r,in1c]
+// size(in2) = [in2r,in2c]
+// size(out) = [outr,outc]
+//
+// we have the following combinations:
+// in1   in2   outr   outc
+// -----------------------
+//  S     S    in2r   in2c    
+//  S     M    in2r   in2c
+//  M     S    in1r   in1c
+//  M     M    in1r   in1c
+//
+// Where S means that the input is a scalar
+// and M means that the input is a matrix.
+// There is also the case related to the string catenation!
+// This is the main difference between - and + operators.
+//
+// Input data:
+// in1size: size of input number 1. It is an array of 2 strings. 
+//          The first string specifies the number of rows.
+//          The second string specifies the number of columns.
+// 
+// in2size: size of input number 2. It is an array of 2 strings. 
+//          The first string specifies the number of rows.
+//          The second string specifies the number of columns.
+//
+// Output data:
+// opoutsize: size of output. It is an array of 2 strings. 
+//            The first string specifies the number of rows.
+//            The second string specifies the number of columns. 
+//
+// Status:
+// 18-Mar-2008 -- Raffaele Nutricato: Author.
+// 18-Mar-2008 -- 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. ---
+// ------------------------
+// --- Get dimensions of input arguments. ---
+in1size = string(in1size);
+in2size = string(in2size);
+in1type = string(in1type);
+in2type = string(in2type);
+in1dim = GetSymbolDimension(in1size);
+in2dim = GetSymbolDimension(in2size);
+if (isnum(in2size(2))) then
+        if(in2size(2) == '3') then
+            in1num_c = eval(in1size(2));
+            in1num_r = eval(in2size(1));
+            opoutsize(1) = string(in1num_r);
+            opoutsize(2) = string(in1num_c);
+        else
+         
+            in2num_r = eval(in1size(1));
+            in2num_c = eval(in2size(1));
+            opoutsize(1) = string(in2num_r);
+            opoutsize(2) = string(in2num_c);
+        end
+else
+        if(in2size(2) == 3)
+           opoutsize(2) = '('+string(in1size(2))+')';
+         
+        else
+           opoutsize(1) = '('+string(in1size(1))+')';
+           
+       end
+end
+
+endfunction