Expr.arctan

methodView source ↗

def arctan() -> Expr

Categories: numeric

Calculate the inverse tangent of the element value.

Examples

>>> import tabsdata as td
>>>
>>> tf: td.TableFrame ...
>>>
>>> tf = tf.select(td.col("val"), , td.col("val").arctan().alias("arctan"))
>>>
┌──────┬──────────┐
│ val  ┆ arctan   │
│ ---  ┆ ---      │
│ f64  ┆ f64      │
╞══════╪══════════╡
│ 0.01 ┆ 0.01     │
│ 0.15 ┆ 0.14889  │
│ 0.18 ┆ 0.178093 │
│ 0.6  ┆ 0.54042  │
│ 0.6  ┆ 0.54042  │
│ 0.75 ┆ 0.643501 │
│ null ┆ null     │
└──────┴──────────┘