polars.Expr.mean

Expr.mean() → Self

Get mean value.

Examples

>>> df = pl.DataFrame({"a": [-1, 0, 1]})
>>> df.select(pl.col("a").mean())
shape: (1, 1)
┌─────┐
│ a   │
│ --- │
│ f64 │
╞═════╡
│ 0.0 │
└─────┘