pandas increment value on condition

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showing results for - "pandas increment value on condition"
Mats
03 Apr 2016
1In [47]: df['ans'] = (df['ix'] != df['ix'].shift(1)).cumsum()
2
3In [48]: df
4Out[48]: 
5   index  ix  ans
60      1  pa    1
71      2  pa    1
82      3  pa    1
93      4  pe    2
104      5  fc    3
115      6  pb    4
126      7  pb    4
137      8  df    5
14
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