diff --git a/matlab/indnv.m b/matlab/indnv.m
index 11cfef45f..df4b18a67 100644
--- a/matlab/indnv.m
+++ b/matlab/indnv.m
@@ -1,7 +1,21 @@
-% Copyright (C) 2001 Michel Juillard
-%
 function a=indnv(x,y)
 
+% function a=indnv(x,y)
+% Finds the elements indices of one vector in an other one
+%
+% INPUTS
+%    x:         column vector
+%    y:         column vector
+%
+% OUTPUTS
+%    a:         vector of elements position of x in y
+%
+% SPECIAL REQUIREMENTS
+%    none
+%  
+% part of DYNARE, copyright Dynare Team (2001-2007)
+% Gnu Public License.
+
 a = zeros(size(x)) ;
 
 for i = 1:size(x,1)