org.matheclipse.core.reflection.system

Class CoefficientList

java.lang.Object

org.matheclipse.core.eval.interfaces.AbstractEvaluator

org.matheclipse.core.eval.interfaces.AbstractFunctionEvaluator

org.matheclipse.core.reflection.system.CoefficientList

All Implemented Interfaces:

IFunctionEvaluator, IEvaluator

public class CoefficientList
extends AbstractFunctionEvaluator

Constructor Summary

Constructors

Constructor and Description
CoefficientList()

Method Summary

Modifier and Type	Method and Description
static double[]	coefficientList(IExpr polynomial, ISymbol variable) Get the coefficient list of a univariate polynomial.
IExpr	evaluate(IAST ast, EvalEngine engine) Symbolic evaluation of a function.
static long	univariateCoefficientList(IExpr polynomial, ISymbol variable, java.util.List<IExpr> resultList)
static long	univariateCoefficientList(IExpr polynomial, ISymbol variable, java.util.List<IExpr> resultList, java.util.List<IExpr> resultListDiff)

Methods inherited from class org.matheclipse.core.eval.interfaces.AbstractFunctionEvaluator

createRuleFromMethod, getNormalizedNegativeExpression, getNormalizedNegativeExpression, getPeriodicParts, getPureImaginaryPart, getRuleAST, initSerializedRules, isNegativeExpression, setUp

Methods inherited from class org.matheclipse.core.eval.interfaces.AbstractEvaluator

numericEval

Methods inherited from class java.lang.Object

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

Constructor Detail

CoefficientList

public CoefficientList()

Method Detail

evaluate

public IExpr evaluate(IAST ast,
                      EvalEngine engine)

Description copied from class: AbstractFunctionEvaluator

Symbolic evaluation of a function. ast.get(0) (or alternatively ast.head()) contains the head (i.e. the function symbol) of this abstract syntax tree (AST).
From ast.arg1() to ast.get(n) the ast contains the first to n-th argument of the function (alternatively you get the first to fifth argument with the methods arg1(), arg2(),... arg5()).
If necessary use the methods from the Validate class to check the number or types of arguments in the evaluate method.
Note: if the symbolic evaluation isn't possible or no result is found the evaluate method returns with a null value without throwing an exception!

Specified by:

evaluate in interface IFunctionEvaluator

Specified by:

evaluate in class AbstractFunctionEvaluator

Parameters:

ast - the abstract syntax tree (AST) which should be evaluated

engine - the users current evaluation engine

Returns:

the evaluated object or null, if evaluation isn't possible

See Also:

Validate, IExpr.head(), IAST.arg1(), IAST.arg2(), IAST.arg3()

coefficientList

public static double[] coefficientList(IExpr polynomial,
                                       ISymbol variable)
                                throws JASConversionException

Get the coefficient list of a univariate polynomial.

Parameters:

polynomial -

variable -

Returns:

null if the list couldn't be evaluated.

Throws:

JASConversionException

univariateCoefficientList

public static long univariateCoefficientList(IExpr polynomial,
                                             ISymbol variable,
                                             java.util.List<IExpr> resultList)
                                      throws JASConversionException

Throws:

JASConversionException

univariateCoefficientList

public static long univariateCoefficientList(IExpr polynomial,
                                             ISymbol variable,
                                             java.util.List<IExpr> resultList,
                                             java.util.List<IExpr> resultListDiff)
                                      throws JASConversionException

Parameters:

polynomial -

variable -

resultList - the coefficient list of the given univariate polynomial in increasing order

resultListDiff - the coefficient list of the derivative of the given univariate polynomial

Returns:

the degree of the univariate polynomial; if degree >= Short.MAX_VALUE, the result list will be empty.

Throws:

JASConversionException