DataFrame.std(axis=None, skipna=None, level=None, ddof=1, numeric_only=None, **kwargs)

DataFrame.insert(loc, column, value, allow_duplicates=False)

DataFrame.add(other, axis='columns', level=None, fill_value=None)

DataFrame.to_stata(fname, convert_dates=None, write_index=True, encoding='latin-1', byteorder=None, time_stamp=None, data_label=None, v

DataFrame.info(verbose=None, buf=None, max_cols=None, memory_usage=None, null_counts=None)

DataFrame.plot.area(x=None, y=None, **kwds)

DataFrame.join(other, on=None, how='left', lsuffix='', rsuffix='', sort=False)

DataFrame.compound(axis=None, skipna=None, level=None)

DataFrame.reorder_levels(order, axis=0)

DataFrame.to_timestamp(freq=None, how='start', axis=0, copy=True)