diff --git a/modules/util/bar_plot.py b/modules/util/bar_plot.py
index b7017f8ffae137119d049c1a4a28a2b4b91c9bf7..9f8967b45dc0593acb70443c43c7135e05a461cc 100644
--- a/modules/util/bar_plot.py
+++ b/modules/util/bar_plot.py
@@ -2,6 +2,10 @@ import numpy as np
 import matplotlib.pyplot as plt
 
 
+# Example
+# do_plot(['5', '10', '15', '20', '30', '40', '60', '80', '100', '120', '140', '160'], [values, values_bt, values_bt_frefl], ['OPD', 'BT+OPD', 'BT+REFL+OPD'],
+# ['green', 'blue', 'black'], title='OPD SRES Estimation Model Comparison', xlabel='OPD', ylabel='MAE %', barWidth=0.3)
+
 def do_plot(group_names, group_values, value_labels, bar_colors, title=None, xlabel=None, ylabel=None, ylim=None, barWidth=0.1):
     num_groups = len(group_names)
     num_bars = len(group_values)