diff --git a/RotM.m b/RotM.m
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+## Copyright (C) 2023 loann
+
+## Author: loann <rio.loann@gmail.com>
+## Created: 2023-02-03
+##
+
+function matrix = RotM (theta)
+%%%%%%%%%%%%%%%%%%%%%
+% function matrix = RotM (theta)
+% ex. outVector = add2vectors(1.2433)
+%
+% Task: create a rotation matrix for a specific angle
+%
+% Inputs: 
+%	- theta: angle in radius
+%
+% Output:
+%	-matrix: 2 dimention rotation matrix
+%
+% author: Loann rio (rio.loann@gmail.com)
+% date: 03/02/2023
+%%%%%%%%%%%%%%%%%%%%%
+matrix = [cos(theta) -sin(theta); sin(theta) cos(theta)]
+endfunction