def variance(arg, where=None, how='sample'):
"""
Compute standard deviation of numeric array
Parameters
----------
how : {'sample', 'pop'}, default 'sample'
Returns
-------
stdev : double scalar
"""
expr = _ops.Variance(arg, where, how).to_expr()
expr = expr.name('var')
return expr
def var(
self,
where: ir.BooleanValue | None = None,
how: Literal["sample", "pop"] = "sample",
) -> NumericScalar:
"""Return the variance of a numeric column.
Parameters
----------
where
Filter
how
Sample or population variance
Returns
-------
NumericScalar
Standard deviation of `arg`
"""
from ibis.expr import operations as ops
return ops.Variance(self, how=how, where=where).to_expr().name("var")