polars.LazyFrame.mean#

LazyFrame.mean() LDF[source]#

Aggregate the columns in the DataFrame to their mean value.

Examples

>>> df = pl.DataFrame({"a": [1, 2, 3, 4], "b": [1, 2, 1, 1]}).lazy()
>>> df.mean().collect()
shape: (1, 2)
┌─────┬──────┐
│ a   ┆ b    │
│ --- ┆ ---  │
│ f64 ┆ f64  │
╞═════╪══════╡
│ 2.5 ┆ 1.25 │
└─────┴──────┘