polars.Expr.mode

Expr.mode(
    *,
    maintain_order: bool = False,
) → Expr

Compute the most occurring value(s).

Can return multiple Values.

engine:In MemoryStreaming

Parameters:

maintain_order

Maintain order of data. This requires more work.

Examples

>>> df = pl.DataFrame(
...     {
...         "a": [1, 1, 2, 3],
...         "b": [1, 1, 2, 2],
...     }
... )
>>> df.select(pl.all().mode().first())  
shape: (2, 2)
┌─────┬─────┐
│ a   ┆ b   │
│ --- ┆ --- │
│ i64 ┆ i64 │
╞═════╪═════╡
│ 1   ┆ 1   │
└─────┴─────┘