water.rapids.ast.prims.reducers

Class AstReducerOp

java.lang.Object

water.Iced<AstRoot>

water.rapids.ast.AstRoot

water.rapids.ast.AstPrimitive

water.rapids.ast.prims.reducers.AstReducerOp

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.lang.Cloneable, Freezable<AstRoot>

Direct Known Subclasses:

AstRollupOp

public abstract class AstReducerOp
extends AstPrimitive

Subclasses take a Frame and produces a scalar. NAs -> NAs

See Also:

Serialized Form

Field Summary

Fields inherited from class water.rapids.ast.AstRoot

CONSTS, PRIMS

Constructor Summary

Constructors

Constructor and Description
AstReducerOp()

Method Summary

Methods

Modifier and Type	Method and Description
Val	apply(Env env, Env.StackHelp stk, AstRoot[] asts)
int	nargs()
abstract double	op(double l, double r) Override to express a basic math primitive

Methods inherited from class water.rapids.ast.AstPrimitive

args, description, example, exec

Methods inherited from class water.rapids.ast.AstRoot

columns, newAstFrame, newAstStr, str, toString

Methods inherited from class water.Iced

asBytes, clone, copyOver, frozenType, read, readExternal, readJSON, reloadFromBytes, toJsonString, write, writeExternal, writeJSON

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AstReducerOp

public AstReducerOp()

Method Detail

nargs

public int nargs()

Specified by:

nargs in class AstRoot

apply

public Val apply(Env env,
        Env.StackHelp stk,
        AstRoot[] asts)

Overrides:

apply in class AstRoot

op

public abstract double op(double l,
        double r)

Override to express a basic math primitive