diff --git a/code/utility.py b/code/utility.py
index 68102d3..0f3ce19 100644
--- a/code/utility.py
+++ b/code/utility.py
@@ -23,3 +23,14 @@ def gaussian(x, mu, sig):
 	y = np.exp(-np.power(x - mu, 2.) / (2 * np.power(sig, 2.)))
 	return y
 
+def map_keys(input):
+	df_map = {} 
+	for k in input.keys():
+		df = k[1]
+		ch = k[3] 
+		if df in df_map.keys():
+			df_map[df].append(k)
+		else:
+			df_map[df] = [k]
+	return df_map
+	print(ch)