BUG on plotting.py radviz 
pandas 0.14.0 in plotting.py

the varable n in line 389: n = len(frame)
is wrongly asigned again in line 404: n = len(frame.columns) - 1
that brakes in line 409: for i in range(n):

This shuld fix the bug
line 389:  rows = len(frame)
line 409:  for i in range(rows):
