polars.Expr.round#

Expr.round(decimals: int) Expr[source]#

Round underlying floating point data by decimals digits.

Parameters:
decimals

Number of decimals to round by.

Examples

>>> df = pl.DataFrame({"a": [0.33, 0.52, 1.02, 1.17]})
>>> df.select(pl.col("a").round(1))
shape: (4, 1)
┌─────┐
│ a   │
│ --- │
│ f64 │
╞═════╡
│ 0.3 │
├╌╌╌╌╌┤
│ 0.5 │
├╌╌╌╌╌┤
│ 1.0 │
├╌╌╌╌╌┤
│ 1.2 │
└─────┘