tabsdata.tableframe.expr.expr.Expr.rank

Expr.rank(method: Literal['average', 'min', 'max', 'dense', 'ordinal', 'random'] = 'average', *, descending: bool = False, seed: int | None = None) → Expr

Compute the rank of the element values. Multiple rank types are available.

Parameters:

• method – the ranking type: ‘average’ (default), ‘dense’, ‘max’, ‘min’, ‘ordinal’ or ‘random’.

• descending – if the order is ascending (default) or descending.

• seed – random seed when using ‘random’ rank type.

Example:

>>> import tabsdata as td
>>>
>>> tf: td.TableFrame ...
>>>
>>> tf.select(td.col("val"), td.col("val").rank("max").alias("rank"))
>>>
┌──────┬──────┐
│ val  ┆ rank │
│ ---  ┆ ---  │
│ f64  ┆ u32  │
╞══════╪══════╡
│ -1.0 ┆ 1    │
│ 0.0  ┆ 2    │
│ 1.1  ┆ 3    │
│ 2.0  ┆ 4    │
│ inf  ┆ 5    │
│ null ┆ null │
│ NaN  ┆ 6    │
└──────┴──────┘