diff --git a/matlab/set_all_parameters.m b/matlab/set_all_parameters.m
index 496ef3f9d..a1739b969 100644
--- a/matlab/set_all_parameters.m
+++ b/matlab/set_all_parameters.m
@@ -1,4 +1,20 @@
 function set_all_parameters(xparam1)
+
+% function set_all_parameters(xparam1)
+% Sets parameters value 
+% 
+% INPUTS
+%    xparam1:   vector of parameters to be estimated (initial values)
+%    
+% OUTPUTS
+%    none
+%        
+% SPECIAL REQUIREMENTS
+%    none
+%  
+% part of DYNARE, copyright Dynare Team (2003-2008)
+% Gnu Public License.
+
   global estim_params_ M_
   
   nvx = estim_params_.nvx;