diff --git a/IDS/gen_filament.m b/IDS/gen_filament.m
index 8a2e09aa4bc563417c0a625d4bf8cad262ebbbad..17ea709d8a018cfd017e29dd320c7cf6585454d4 100644
--- a/IDS/gen_filament.m
+++ b/IDS/gen_filament.m
@@ -1,5 +1,5 @@
 function  [discretizationr, discretizationz, Twc] = gen_filament(vvdata, num, type_coil_description,varargin)
-% Generate filamentary(windings) discretization from different geometrical coil descriptions
+% Generate filamentary(windings) discretization, and grouping matrix, from different geometrical coil descriptions
 
 % type_coil_description = 2 -> rectangle description
 % type_coil_description = 3 -> oblique description