tabsdata.tableframe.expr.expr.Expr.arctanh

Expr.arctanh() → Expr

Calculate the inverse hyperbolic tangent of the element value.

Example:

>>> import tabsdata as td
>>>
>>> tf: td.TableFrame ...
>>>
>>> tf = tf.select(td.col("val"), , td.col("val").arctanh().alias("arctanh"))
>>>
┌──────┬──────────┐
│ val  ┆ arctanh  │
│ ---  ┆ ---      │
│ f64  ┆ f64      │
╞══════╪══════════╡
│ 0.01 ┆ 0.01     │
│ 0.15 ┆ 0.15114  │
│ 0.18 ┆ 0.181983 │
│ 0.6  ┆ 0.693147 │
│ 0.6  ┆ 0.693147 │
│ 0.75 ┆ 0.972955 │
│ null ┆ null     │
└──────┴──────────┘