improved form processing in summary edit

rowers/dataprep.py

@@ -2364,3 +2364,23 @@ def workout_rscore(w):
         tss = 0
 
     return tss,normp
+
+def workout_normv(w,pp=4.0):
+    df,row = getrowdata_db(id=w.id)
+    df = clean_df_stats(df,workstrokesonly=False)
+    if df.empty:
+        df,row = getrowdata_db(id=w.id)
+        df = clean_df_stats(df,workstrokesonly=False)
+
+    df['deltat'] = df['time'].diff()
+    duration = df['time'].max()-df['time'].min()
+    duration /= 1.0e3
+    df['v4'] = df['velo']**(pp)
+    v4mean = wavg(df,'v4','deltat')
+    normv = v4mean**(1./pp)
+
+    if np.isnan(normv):
+        return 500./120.
+
+    return normv
+