diff --git a/RotTable.py b/RotTable.py
index 5ca40c37f2a6564a4d3244af2da1c0a2f8316984..ae014b45dcb00385847dd8987b467688547b0759 100644
--- a/RotTable.py
+++ b/RotTable.py
@@ -24,13 +24,15 @@ class RotTable:
         "TT": [35.62, 7.2, -154, 0.06, 0.6, 0]\
         }
 
+    # get the angles in each axis (x, y, z), considering a deviation
     def __init__(self):
         self.rot_table = {}
         for dinucleotide in RotTable.__ORIGINAL_ROT_TABLE:
             self.rot_table[dinucleotide] = RotTable.__ORIGINAL_ROT_TABLE[dinucleotide][:3]
         self.alea()
 
-    
+    # considering the errors (last 3 columns of __ORIGINAL_ROT_TABLE),
+    # add random error to the "mean value" of the angles of each axis
     def alea(self):
         for dinucleotide in RotTable.__ORIGINAL_ROT_TABLE:
             for i in range(2):