diff --git a/matlab/GiveCPUnumber.m b/matlab/GiveCPUnumber.m
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+++ b/matlab/GiveCPUnumber.m
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+function [nCPU]= GiveCPUnumber (ComputerInformations)
+
+% DESCRIPTION
+% This function return the CPUs or cores numer avaiable
+% on the computer used for run parallel code.
+
+% INPUTS
+% an array contained several fields that describe the hardaware 
+% software enviroments of a generic computer.
+%    
+% OUTPUTS
+% The CPUs or Cores numbers of computer. 
+%        
+% SPECIAL REQUIREMENTS
+%    none
+
+% Copyright (C) 2005-2009 Dynare Team
+%
+% This file is part of Dynare.
+%
+% Dynare is free software: you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation, either version 3 of the License, or
+% (at your option) any later version.
+%
+% Dynare is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
+
+
+nCPU=-1;
+
+OffSet=27;
+    
+SringPosition=strfind(ComputerInformations, 'Processors:');
+nCPU=ComputerInformations(SringPosition+OffSet);
+
+% We check if there are Processors/Cores more than 9.
+  
+ 
+   t0=ComputerInformations(SringPosition+OffSet+1);
+   t1=str2num(t0);
+   t1=isempty(t1);
+   
+   % if t1 is 0 the machine have more than 9 CPU.
+   
+   if t1==0
+       nCPU=strcat(nCPU,t0);    
+   end
+   
+   nCPU=str2num(nCPU);
+   
+   return
+   
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