Trait AsofJoinBy

pub trait AsofJoinBy: IntoDf {
    // Provided method
    fn join_asof_by<I, S>(
        &self,
        other: &DataFrame,
        left_on: &str,
        right_on: &str,
        left_by: I,
        right_by: I,
        strategy: AsofStrategy,
        tolerance: Option<AnyValue<'static>>,
    ) -> Result<DataFrame, PolarsError>
       where I: IntoIterator<Item = S>,
             S: AsRef<str> { ... }
}

Available on crate feature polars-ops only.

Provided Methods

fn join_asof_by<I, S>( &self, other: &DataFrame, left_on: &str, right_on: &str, left_by: I, right_by: I, strategy: AsofStrategy, tolerance: Option<AnyValue<'static>>, ) -> Result<DataFrame, PolarsError>

where I: IntoIterator<Item = S>, S: AsRef<str>,

This is similar to a left-join except that we match on nearest key rather than equal keys. The keys must be sorted to perform an asof join. This is a special implementation of an asof join that searches for the nearest keys within a subgroup set by by.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl AsofJoinBy for DataFrame