polars.mean

polars.mean(column: str) → Expr

polars.mean(column: Series) → float

Get the mean value.

Examples

>>> df = pl.DataFrame({"a": [1, 8, 3], "b": [4, 5, 2], "c": ["foo", "bar", "foo"]})
>>> df.select(pl.mean("a"))
shape: (1, 1)
┌─────┐
│ a   │
│ --- │
│ f64 │
╞═════╡
│ 4.0 │
└─────┘