def run(self, table):
column = table.columns[self._column_name]
data = column.values_without_nulls_sorted()
m = self._median.run(table)
return median(tuple(abs(n - m) for n in data))
def run(self, table):
column = table.columns[self._column_name]
data = column.values_without_nulls_sorted()
if data:
m = self._median.run(table)
return median(tuple(abs(n - m) for n in data))
def run(self, column):
"""
:returns: :class:`decimal.Decimal`.
"""
if not isinstance(column.data_type, Number):
raise DataTypeError(
'MAD can only be applied to columns containing Number data.')
if column.aggregate(HasNulls()):
warn_null_calculation(self, column)
data = column.values_without_nulls_sorted()
m = column.aggregate(Percentiles())[50]
return median(tuple(abs(n - m) for n in data))
def run(self, table):
"""
:returns:
:class:`decimal.Decimal`.
"""
column = table.columns[self._column_name]
if not isinstance(column.data_type, Number):
raise DataTypeError('MAD can only be applied to columns containing Number data.')
has_nulls = HasNulls(self._column_name).run(table)
if has_nulls:
warn_null_calculation(self, column)
data = column.values_without_nulls_sorted()
m = Median(self._column_name).run(table)
return median(tuple(abs(n - m) for n in data))