Term

All Superinterfaces:

HyperTerm, java.io.Serializable

All Known Implementing Classes:

AbstractBiFunction, AbstractFunction, AbstractTerm, Constant, DoubleFunction, IntFunction, Operator
```
public interface Term
extends HyperTerm
```
A term is recursively constructed from constant symbols, variables and function symbols. A term returns a single value when applied to a data object (e.g. Tuple).

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`default BaseVector`	`apply(DataFrame df)`
`java.lang.Object`	`apply(Tuple o)` Applies the term on a data object.
`default boolean`	`applyAsBoolean(Tuple o)` Applies the term on a data object and produces an boolean-valued result.
`default byte`	`applyAsByte(Tuple o)` Applies the term on a data object and produces an byte-valued result.
`default char`	`applyAsChar(Tuple o)` Applies the term on a data object and produces an char-valued result.
`default double`	`applyAsDouble(Tuple o)` Applies the term on a data object and produces an double-valued result.
`default float`	`applyAsFloat(Tuple o)` Applies the term on a data object and produces an float-valued result.
`default int`	`applyAsInt(Tuple o)` Applies the term on a data object and produces an int-valued result.
`default long`	`applyAsLong(Tuple o)` Applies the term on a data object and produces an long-valued result.
`default short`	`applyAsShort(Tuple o)` Applies the term on a data object and produces an short-valued result.
`default StructField`	`field()` Returns the field meta data of output variable.
`default boolean`	`isConstant()` Returns true if the term represents a constant value.
`default boolean`	`isVariable()` Returns true if the term represents a plain variable.
`default java.util.Optional<Measure>`	`measure()` Returns the optional level of measurements of output values.
`java.lang.String`	`name()` Returns the name of output values.
`default java.util.List<Term>`	`terms()` Returns the list of terms after expanding the hyperterm.
`DataType`	`type()` Returns the data type of output values.

Methods inherited from interface smile.data.formula.HyperTerm
bind, variables

- Method Detail
  - terms
```
default java.util.List<Term> terms()
```
    Description copied from interface: HyperTerm
    
    Returns the list of terms after expanding the hyperterm.
    
    Specified by:
    
    terms in interface HyperTerm
  - name
```
java.lang.String name()
```
    Returns the name of output values.
  - type
```
DataType type()
```
    Returns the data type of output values.
  - measure
```
default java.util.Optional<Measure> measure()
```
    Returns the optional level of measurements of output values.
  - field
```
default StructField field()
```
    Returns the field meta data of output variable.
  - apply
```
java.lang.Object apply(Tuple o)
```
    Applies the term on a data object.
  - applyAsDouble
```
default double applyAsDouble(Tuple o)
```
    Applies the term on a data object and produces an double-valued result.
  - applyAsFloat
```
default float applyAsFloat(Tuple o)
```
    Applies the term on a data object and produces an float-valued result.
  - applyAsInt
```
default int applyAsInt(Tuple o)
```
    Applies the term on a data object and produces an int-valued result.
  - applyAsLong
```
default long applyAsLong(Tuple o)
```
    Applies the term on a data object and produces an long-valued result.
  - applyAsBoolean
```
default boolean applyAsBoolean(Tuple o)
```
    Applies the term on a data object and produces an boolean-valued result.
  - applyAsByte
```
default byte applyAsByte(Tuple o)
```
    Applies the term on a data object and produces an byte-valued result.
  - applyAsShort
```
default short applyAsShort(Tuple o)
```
    Applies the term on a data object and produces an short-valued result.
  - applyAsChar
```
default char applyAsChar(Tuple o)
```
    Applies the term on a data object and produces an char-valued result.
  - isVariable
```
default boolean isVariable()
```
    Returns true if the term represents a plain variable.
  - isConstant
```
default boolean isConstant()
```
    Returns true if the term represents a constant value.
  - apply
```
default BaseVector apply(DataFrame df)
```

Interface Term

Method Summary

Methods inherited from interface smile.data.formula.HyperTerm

Method Detail

terms

name

type

measure

field

apply

applyAsDouble

applyAsFloat

applyAsInt

applyAsLong

applyAsBoolean

applyAsByte

applyAsShort

applyAsChar

isVariable

isConstant

apply