polars.Expr.log1p#
- Expr.log1p() Expr [source]#
Compute the natural logarithm of each element plus one.
This computes
log(1 + x)
but is more numerically stable forx
close to zero.Examples
>>> df = pl.DataFrame({"a": [1, 2, 3]}) >>> df.select(pl.col("a").log1p()) shape: (3, 1) ┌──────────┐ │ a │ │ --- │ │ f64 │ ╞══════════╡ │ 0.693147 │ │ 1.098612 │ │ 1.386294 │ └──────────┘