Package com.singularsys.jep.functions

Class RInt

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.NaryFunction

com.singularsys.jep.functions.Round

com.singularsys.jep.functions.RInt

All Implemented Interfaces:

PostfixMathCommandI, Serializable

public class RInt
extends Round

A PostfixMathCommandI which rounds a number to the closest integer. Single argument version rint(2.4) finds the closest integer to the argument 2 and with two arguments rint(2.1234, 3) rounds the argument to 3 decimal places 2.123.

RInt differs from the Round class in that it uses the Math.rint(double) method rather than Math.round(double). In the case of a tie (e.g 1.5) Math.rint() prefers the nearest even integer (so rint(1.5) = 2). This has better statistical properties. For the two argument version you can consider it as a rounding method with a mode of round-half-even.

In Jep 4.1 fixes a bug with round(100000,-5) -> 99999.99999999999.

Since:

3.4

Author:

Nathan Funk

See Also:

• Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

curNumberOfParameters, description, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
RInt()

Method Summary

Modifier and Type	Method	Description
protected double	rint(double param)
Object	round(Object arg)
Object	round(Object l, Object r)

Methods inherited from class com.singularsys.jep.functions.Round

checkNumberOfParameters, eval, round, run

Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, asType, getDescription, getDescription, getDescriptionWithType, getName, getNumberOfParameters, setCurNumberOfParameters, setDescription, setName, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Details

RInt

public RInt()

Method Details

rint

protected double rint(double param)

round

public Object round(Object arg)
             throws EvaluationException

Overrides:

round in class Round

Throws:

EvaluationException

round

public Object round(Object l,
 Object r)
             throws EvaluationException

Overrides:

round in class Round

Throws:

EvaluationException