Struct tangram_features::identity::IdentityFeatureGroup

pub struct IdentityFeatureGroup {
    pub source_column_name: String,
}

An IdentityFeatureGroup describes the simplest possible feature engineering, which passes a single column from the input table to the output features untouched.

Example

For a number column:

input value	feature value
0.2	0.2
3.0	3.0
2.1	2.1

For an enum column:

use std::num::NonZeroUsize;
use tangram_table::prelude::*;

EnumTableColumn::new(
  Some("color".to_owned()),
  vec!["red".to_owned(), "green".to_owned(), "blue".to_owned()],
  vec![None, Some(NonZeroUsize::new(1).unwrap()), Some(NonZeroUsize::new(2).unwrap()), Some(NonZeroUsize::new(3).unwrap())],
);

value	encoding
“INVALID!”	None
“red”	Some(1)
“green”	Some(2)
“blue”	Some(3)

input value	feature value
“INVALID!”	None
“red”	Some(1)
“green”	Some(2)
“blue”	Some(3)

Fields

source_column_name: String

Implementations

impl IdentityFeatureGroup

pub fn compute_table(
    &self,
    column: TableColumnView<'_>,
    progress: &impl Fn(u64)
) -> TableColumn

pub fn compute_array_f32(
    &self,
    features: ArrayViewMut2<'_, f32>,
    column: TableColumnView<'_>,
    progress: &impl Fn()
)

pub fn compute_array_value(
    &self,
    features: ArrayViewMut2<'_, TableValue<'_>>,
    column: TableColumnView<'_>,
    progress: &impl Fn()
)

Trait Implementations

impl Clone for IdentityFeatureGroup

fn clone(&self) -> IdentityFeatureGroup

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for IdentityFeatureGroup

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.