polars.LazyFrame.fill_nan#

LazyFrame.fill_nan(value: int | float | Expr | None) → LazyFrame[source]#

Fill floating point NaN values.

Parameters:

value: Value used to fill NaN values.

See also

fill_null

Notes

A NaN value is not the same as a null value. To fill null values, use fill_null().

Examples

>>> lf = pl.LazyFrame(
...     {
...         "a": [1.5, 2, float("nan"), 4],
...         "b": [0.5, 4, float("nan"), 13],
...     }
... )
>>> lf.fill_nan(99).collect()
shape: (4, 2)
┌──────┬──────┐
│ a    ┆ b    │
│ ---  ┆ ---  │
│ f64  ┆ f64  │
╞══════╪══════╡
│ 1.5  ┆ 0.5  │
│ 2.0  ┆ 4.0  │
│ 99.0 ┆ 99.0 │
│ 4.0  ┆ 13.0 │
└──────┴──────┘