Expr.cos

methodView source ↗

def cos() -> Expr

Categories: numeric

Calculate the cosine of the element value.

Examples

>>> import tabsdata as td
>>>
>>> tf: td.TableFrame ...
>>>
>>> tf = tf.select(td.col("val"), td.col("val").cos().alias("cos"))
>>>
┌──────┬───────────┐
│ val  ┆ cos       │
│ ---  ┆ ---       │
│ f64  ┆ f64       │
╞══════╪═══════════╡
│ 0.1  ┆ 0.995004  │
│ 1.5  ┆ 0.070737  │
│ 1.8  ┆ -0.227202 │
│ 6.0  ┆ 0.96017   │
│ 6.0  ┆ 0.96017   │
│ 7.5  ┆ 0.346635  │
│ null ┆ null      │
└──────┴───────────┘