elbow.py : In find_elbow() change default 'pointsPerLine' to 5.

elbow.py

 
     return dbV
 
-def find_elbow( usL, dbL, pointsPerLine=10 ):
+def find_elbow( usL, dbL, pointsPerLine=5 ):
     
     ppl_2         = int(pointsPerLine/2)
     dL = []
         i += 1
 
     # find the max angle
-    i = np.argmax( dL )    
+    i = np.argmax( dL )
 
     # return the x,y coordinate of the first data point of the second line
     return (usL[i+ppl_2],dbL[i+ppl_2])