org.jscience.mathematics.analysis.expressions
Class BinaryOperator

java.lang.Object
  org.jscience.mathematics.analysis.expressions.OperatorExpression
      org.jscience.mathematics.analysis.expressions.BinaryOperator

All Implemented Interfaces:

java.io.Serializable, Expression, JavaExpressible, XMLExpressible

Direct Known Subclasses:

Addition, Atan2, Diff, Division, Gauss, Max, Min, Multiplication, Pow, Rand, Subtraction

public abstract class BinaryOperator
extends OperatorExpression

Abstract class used as superclass for binary operators.

See Also:

UnaryOperator, OperatorExpression, Serialized Form

Field Summary

protected double[]	deriv DOCUMENT ME!
protected boolean	evalValid DOCUMENT ME!
protected double	evalValue DOCUMENT ME!
protected Expression	secondOperand The second Expression this BinaryOperator works on.
protected boolean[]	valid DOCUMENT ME!

Fields inherited from class org.jscience.mathematics.analysis.expressions.OperatorExpression

firstOperand

Constructor Summary

BinaryOperator(Expression e1, Expression e2)
Creates a BinaryOperator object working on two given Expression objects.

Method Summary

Expression	diff(NamedDataExpression x) Class BinaryOperator provides a default diff method for use by nondifferentiable objects.
java.util.List	getElements() The getElements method must return a java.util.List whose elements are all the subexpressions of the Expression.
Expression	getSecondOperand() Returns the second operand that the BinaryOperator object works on.
boolean	isDifferentiable() Default implementation of method isDifferentiable which assumes that the BinaryOperator object is differentiable.
boolean	isExpandable() Default implementation of method isExpandable which assumes that the BinaryOperator object is expandable.
void	resetNumDiff(int i) DOCUMENT ME!
void	resetNumEval() DOCUMENT ME!
void	setIndex(int i) DOCUMENT ME!
void	setNumberOfIndependents(int n) DOCUMENT ME!
void	setSecondOperand(Expression e2) Assigns the second operand that the BinaryOperator object works on to a given Expression object.
java.lang.String	toTaylorMap() Dummy implementation for classes that are not expandable.

Methods inherited from class org.jscience.mathematics.analysis.expressions.OperatorExpression

contains, factor, getFirstOperand, isolate, isolate, setFirstOperand

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jscience.mathematics.analysis.expressions.Expression

eval, optimize, replace, toJava, toXML

Field Detail

secondOperand

protected Expression secondOperand

The second Expression this BinaryOperator works on.

Since:

1.0

See Also:

OperatorExpression.firstOperand

evalValid

protected boolean evalValid

DOCUMENT ME!

evalValue

protected double evalValue

DOCUMENT ME!

valid

protected boolean[] valid

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deriv

protected double[] deriv

DOCUMENT ME!

Constructor Detail

BinaryOperator

public BinaryOperator(Expression e1,
                      Expression e2)

Creates a BinaryOperator object working on two given Expression objects.

Parameters:

e1 - An Expression object.

e2 - Another Expression object.

Since:

1.0

Method Detail

setSecondOperand

public void setSecondOperand(Expression e2)

Assigns the second operand that the BinaryOperator object works on to a given Expression object.

Parameters:

e2 - An Expression object.

Since:

1.0

See Also:

OperatorExpression.setFirstOperand(org.jscience.mathematics.analysis.expressions.Expression)

getSecondOperand

public Expression getSecondOperand()

Returns the second operand that the BinaryOperator object works on.

Returns:

An Expression object that represents the second operand that the BinaryOperator object works on.

Since:

1.0

See Also:

OperatorExpression.getFirstOperand(), setSecondOperand(org.jscience.mathematics.analysis.expressions.Expression)

isDifferentiable

public boolean isDifferentiable()

Default implementation of method isDifferentiable which assumes that the BinaryOperator object is differentiable. All nondifferentiable BinaryOperators must overrride this implementation.

See Also:

Expression.isDifferentiable()

isExpandable

public boolean isExpandable()

Default implementation of method isExpandable which assumes that the BinaryOperator object is expandable. All nonexpandable BinaryOperators must overrride this implementation.

Returns:

DOCUMENT ME!

See Also:

Expression.isExpandable()

diff

public Expression diff(NamedDataExpression x)

Class BinaryOperator provides a default diff method for use by nondifferentiable objects. All differentiable objects must override this diff method.

Parameters:

x - DOCUMENT ME!

Returns:

DOCUMENT ME!

toTaylorMap

public java.lang.String toTaylorMap()

Dummy implementation for classes that are not expandable.

Returns:

DOCUMENT ME!

getElements

public java.util.List getElements()

Description copied from interface: Expression

The getElements method must return a java.util.List whose elements are all the subexpressions of the Expression. For example the expression "acos(ct)" should return a java.util.List with six subexpressions: "[,a,cos,,c,t]" (the order of which is unspecified).

Returns:

DOCUMENT ME!

resetNumEval

public void resetNumEval()

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resetNumDiff

public void resetNumDiff(int i)

DOCUMENT ME!

Parameters:

i - DOCUMENT ME!

setNumberOfIndependents

public void setNumberOfIndependents(int n)

DOCUMENT ME!

Parameters:

n - DOCUMENT ME!

setIndex

public void setIndex(int i)

DOCUMENT ME!

Parameters:

i - DOCUMENT ME!