org.matheclipse.core.reflection.system

Class Plot

java.lang.Object

org.matheclipse.core.eval.interfaces.AbstractEvaluator

org.matheclipse.core.reflection.system.Plot

All Implemented Interfaces:

IFunctionEvaluator, IEvaluator

public class Plot
extends AbstractEvaluator

Plots x/y functions

Field Summary

Fields

Modifier and Type	Field and Description
static Plot	CONST Constructor for the singleton

Constructor Summary

Constructors

Constructor and Description
Plot()

Method Summary

Modifier and Type	Method and Description
IExpr	evaluate(IAST ast, EvalEngine engine) Symbolic evaluation of a function.
IExpr	plotLine(double ad, double bd, double y0d, double y1d, IExpr function, ISymbol xVar, EvalEngine engine)
void	setUp(ISymbol symbol) Evaluate built-in rules and define Attributes for a function.

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

Field Detail

CONST

public static final Plot CONST

Constructor for the singleton

Constructor Detail

Plot

public Plot()

Method Detail

evaluate

public IExpr evaluate(IAST ast,
                      EvalEngine engine)

Description copied from class: AbstractEvaluator

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 AbstractEvaluator

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()

plotLine

public IExpr plotLine(double ad,
                      double bd,
                      double y0d,
                      double y1d,
                      IExpr function,
                      ISymbol xVar,
                      EvalEngine engine)

Parameters:

ad -

bd -

y0d -

y1d -

function -

xVar -

engine -

Returns:

F.NIL is no conversion of the data into an IExpr was possible

setUp

public void setUp(ISymbol symbol)
           throws SyntaxError

Description copied from class: AbstractEvaluator

Evaluate built-in rules and define Attributes for a function.

Specified by:

setUp in interface IEvaluator

Overrides:

setUp in class AbstractEvaluator

Parameters:

symbol - the symbol which should be set up

Throws:

SyntaxError