polars.Expr.peak_min

Expr.peak_min() → Self

Get a boolean mask of the local minimum peaks.

Examples

>>> df = pl.DataFrame({"a": [4, 1, 3, 2, 5]})
>>> df.select(pl.col("a").peak_min())
shape: (5, 1)
┌───────┐
│ a     │
│ ---   │
│ bool  │
╞═══════╡
│ false │
│ true  │
│ false │
│ true  │
│ false │
└───────┘