Hi,
I run the same code in coding area with sample code however in sample code is correct but when run in rough coding area there is an error as below:
KeyErrorTraceback (most recent call last)
<ipython-input-5-083aa1f5034f> in <module>()
4 data = get_data('AAPL')
5 # Type your code below
----> 6 data['SMA10'] = pd.rolling_mean(data['Close'],10)
7 data.iloc[-15:]
/opt/conda/envs/python2/lib/python2.7/site-packages/pandas/core/frame.py in __getitem__(self, key)
1967 return self._getitem_multilevel(key)
1968 else:
-> 1969 return self._getitem_column(key)
1970
1971 def _getitem_column(self, key):
/opt/conda/envs/python2/lib/python2.7/site-packages/pandas/core/frame.py in _getitem_column(self, key)
1974 # get column
1975 if self.columns.is_unique:
-> 1976 return self._get_item_cache(key)
1977
1978 # duplicate columns & possible reduce dimensionality
Why is that ?