smile.data.formula

Interface Term

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

Abs, AbstractBiFunction, AbstractFunction, Add, Constant, Date, Div, DoubleFunction, FactorInteraction, IntFunction, Mul, Operator, Sub

public interface Term
extends java.io.Serializable

An abstract term in the formula. A term is recursively constructed from constant symbols, variables and function symbols. A formula consists of a series of terms. To be concise, we also allow HyperTerms that can be can be expanded to multiple simple terms.

Method Summary

Modifier and Type	Method and Description
java.util.List<Feature>	bind(StructType schema) Binds the term to a schema.
default java.util.List<Term>	expand() Expands the term (e.g.
java.util.Set<java.lang.String>	variables() Returns the list of variables used in this term.

Method Detail

bind

java.util.List<Feature> bind(StructType schema)

Binds the term to a schema.

variables

java.util.Set<java.lang.String> variables()

Returns the list of variables used in this term.

expand

default java.util.List<Term> expand()

Expands the term (e.g. FactorCrossing).