polars.Expr.std#
- Expr.std(ddof: int = 1) Expr [source]#
Get standard deviation.
- Parameters:
- ddof
“Delta Degrees of Freedom”: the divisor used in the calculation is N - ddof, where N represents the number of elements. By default ddof is 1.
Examples
>>> df = pl.DataFrame({"a": [-1, 0, 1]}) >>> df.select(pl.col("a").std()) shape: (1, 1) ┌─────┐ │ a │ │ --- │ │ f64 │ ╞═════╡ │ 1.0 │ └─────┘