able to calculate polarization index (from power only)

rowers/metrics.py

@@ -11,6 +11,8 @@ import pandas as pd
 from scipy import optimize
 from django.utils import timezone
 
+from math import log10
+
 nometrics = [
     'originalvelo',
     'cumdist',
@@ -359,8 +361,6 @@ This value should be fairly constant across all stroke rates.""",
     )
 
 
-def polarization_index(df,rower):
-    return 0
 
 def calc_trimp(df,sex,hrmax,hrmin,hrftp):
     if sex == 'male':