Trait indxvec::Indices[−][src]

pub trait Indices {
    fn revindex(self) -> Vec<usize>;

    fn invindex(self) -> Vec<usize>;

    fn complindex(self) -> Vec<usize>;

    fn unindex<T: Copy>(self, v: &[T], ascending: bool) -> Vec<T>;

    fn unindexf64<T: Copy>(self, v: &[T], ascending: bool) -> Vec<f64>
    where
        f64: From<T>;

    fn ucorrelation(self, v: &[usize]) -> f64;

    fn indx_to_f64(self) -> Vec<f64>;
}
Expand description

Methods to manipulate indices of Vec<usize> type.

Required methods

Reverse an index slice by simple reverse iteration.

Invert an index.

complement of the index - turns ranks from/to ascending/descending

Collect values from v in the order of indices in self.

Collects values from v, as f64s, in the order given by self index.

Pearson’s correlation coefficient of two slices, typically the ranks.

Potentially useful clone-recast of &usize to Vec

Implementations on Foreign Types

Reverse an index slice by simple reverse iteration. Creates a new Vec. Its naive use for descending sort etc. Is probably to be avoided for efficiency reasons.

Inverts an index, eg. from sort index to ranks. This is a symmetric operation: any even number of applications gives the original index, odd number gives the inverted form.

Collects values from v in the order given by self index. When ascending is false, collects in descending order.
It is used here by msort for ascending or descending sort.

Collects values from v in the order given by self index and converts them to f64.
When ascending is false, collects in descending order.
It is used here by msort for ascending or descending sort.

Complement of an index (is symmetric) - .complindex() toggles rank index between ascending/descending. .complindex().invindex() = .invindex().revindex()

Pearson’s correlation coefficient of two $[usize] slices. When the inputs are ranks, then this gives Spearman’s correlation of the original data. However, in general, any other ordinal measures could be deployed (not just the ranks).

Potentially useful clone-recast of &usize to Vec

Implementors