Expr.arccos

methodView source ↗

def arccos() -> Expr

Categories: numeric

Calculate the inverse cosine of the element value.

Examples

>>> import tabsdata as td
>>>
>>> tf: td.TableFrame ...
>>>
>>> tf = tf.select(td.col("val"), td.col("val").arccos().alias("arccos"))
>>>
┌──────┬──────────┐
│ val  ┆ arccos   │
│ ---  ┆ ---      │
│ f64  ┆ f64      │
╞══════╪══════════╡
│ 0.01 ┆ 1.560796 │
│ 0.15 ┆ 1.420228 │
│ 0.18 ┆ 1.38981  │
│ 0.6  ┆ 0.927295 │
│ 0.6  ┆ 0.927295 │
│ 0.75 ┆ 0.722734 │
│ null ┆ null     │
└──────┴──────────┘