polars.LazyFrame.interpolate

LazyFrame.interpolate() → Self

Interpolate intermediate values. The interpolation method is linear.

Examples

>>> lf = pl.LazyFrame(
...     {
...         "foo": [1, None, 9, 10],
...         "bar": [6, 7, 9, None],
...         "baz": [1, None, None, 9],
...     }
... )
>>> lf.interpolate().collect()
shape: (4, 3)
┌──────┬──────┬──────────┐
│ foo  ┆ bar  ┆ baz      │
│ ---  ┆ ---  ┆ ---      │
│ f64  ┆ f64  ┆ f64      │
╞══════╪══════╪══════════╡
│ 1.0  ┆ 6.0  ┆ 1.0      │
│ 5.0  ┆ 7.0  ┆ 3.666667 │
│ 9.0  ┆ 9.0  ┆ 6.333333 │
│ 10.0 ┆ null ┆ 9.0      │
└──────┴──────┴──────────┘