Expr.is_nan

methodView source ↗

def is_nan() -> Expr

Categories: logic

If an element value is NaN.

Examples

>>> import tabsdata as td
>>>
>>> tf: td.TableFrame ...
>>>
>>> tf = tf.select(td.col("temp"), td.col("temp").is_nan().alias("nan"))
>>>
┌──────┬──────────┐
│ temp ┆ nan      │
│ ---  ┆ ---      │
│ f64  ┆ bool     │
╞══════╪══════════╡
│ 1.1  ┆ false    │
│ Nan  ┆ true     │
│ None ┆ false    │
│ inf  ┆ false    │
└──────┴──────────┘