64 lines
1.4 KiB
Python
64 lines
1.4 KiB
Python
from django.db.models import Aggregate, FloatField, IntegerField
|
|
|
|
__all__ = [
|
|
'CovarPop', 'Corr', 'RegrAvgX', 'RegrAvgY', 'RegrCount', 'RegrIntercept',
|
|
'RegrR2', 'RegrSlope', 'RegrSXX', 'RegrSXY', 'RegrSYY', 'StatAggregate',
|
|
]
|
|
|
|
|
|
class StatAggregate(Aggregate):
|
|
output_field = FloatField()
|
|
|
|
def __init__(self, y, x, output_field=None, filter=None, default=None):
|
|
if not x or not y:
|
|
raise ValueError('Both y and x must be provided.')
|
|
super().__init__(y, x, output_field=output_field, filter=filter, default=default)
|
|
|
|
|
|
class Corr(StatAggregate):
|
|
function = 'CORR'
|
|
|
|
|
|
class CovarPop(StatAggregate):
|
|
def __init__(self, y, x, sample=False, filter=None, default=None):
|
|
self.function = 'COVAR_SAMP' if sample else 'COVAR_POP'
|
|
super().__init__(y, x, filter=filter, default=default)
|
|
|
|
|
|
class RegrAvgX(StatAggregate):
|
|
function = 'REGR_AVGX'
|
|
|
|
|
|
class RegrAvgY(StatAggregate):
|
|
function = 'REGR_AVGY'
|
|
|
|
|
|
class RegrCount(StatAggregate):
|
|
function = 'REGR_COUNT'
|
|
output_field = IntegerField()
|
|
empty_aggregate_value = 0
|
|
|
|
|
|
class RegrIntercept(StatAggregate):
|
|
function = 'REGR_INTERCEPT'
|
|
|
|
|
|
class RegrR2(StatAggregate):
|
|
function = 'REGR_R2'
|
|
|
|
|
|
class RegrSlope(StatAggregate):
|
|
function = 'REGR_SLOPE'
|
|
|
|
|
|
class RegrSXX(StatAggregate):
|
|
function = 'REGR_SXX'
|
|
|
|
|
|
class RegrSXY(StatAggregate):
|
|
function = 'REGR_SXY'
|
|
|
|
|
|
class RegrSYY(StatAggregate):
|
|
function = 'REGR_SYY'
|