--- a/trafficintelligence/utils.py	Mon Jul 09 16:21:03 2018 -0400
+++ b/trafficintelligence/utils.py	Tue Jul 10 17:16:38 2018 -0400
@@ -591,6 +591,19 @@
         print('Unknown aggregation method: {}'.format(funcStr))
         return None
 
+def aggregationMethods(methods, centiles = None):
+    aggFunctions = {}
+    headers = []
+    for method in methods:
+        if method == 'centile':
+            aggFunctions[method] = aggregationFunction(method, centiles)
+            for c in centiles:
+                headers.append('{}{}'.format(method,c))
+        else:
+            aggFunctions[method] = utils.aggregationFunction(method)
+            headers.append(method)
+    return aggFunctions, headers
+    
 #########################
 # regression analysis using statsmodels (and pandas)
 #########################