Source code for django.contrib.postgres.aggregates.statistics

from django.db.models import Aggregate, FloatField, IntegerField

__all__ = [

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.")
            y, x, output_field=output_field, filter=filter, default=default

[docs]class Corr(StatAggregate): function = "CORR"
[docs]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)
[docs]class RegrAvgX(StatAggregate): function = "REGR_AVGX"
[docs]class RegrAvgY(StatAggregate): function = "REGR_AVGY"
[docs]class RegrCount(StatAggregate): function = "REGR_COUNT" output_field = IntegerField() empty_result_set_value = 0
[docs]class RegrIntercept(StatAggregate): function = "REGR_INTERCEPT"
[docs]class RegrR2(StatAggregate): function = "REGR_R2"
[docs]class RegrSlope(StatAggregate): function = "REGR_SLOPE"
[docs]class RegrSXX(StatAggregate): function = "REGR_SXX"
[docs]class RegrSXY(StatAggregate): function = "REGR_SXY"
[docs]class RegrSYY(StatAggregate): function = "REGR_SYY"
Back to Top