Package jmathexpr

Examples of jmathexpr.Expression

102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
    public static boolean isConvertible(Expression expr, Variable x) {
        if (!(expr instanceof Equality)) {
            return false;
        }
       
        Expression lhs = ((Equality) expr).lhs();
        Expression rhs = ((Equality) expr).rhs();
        boolean lhsIsQuadratic = isQuadratic(lhs, x);
        boolean rhsIsQuadratic = isQuadratic(rhs, x);
       
        return (lhsIsQuadratic
                && (rhs.isConstant() || LinearEquation.isLinear(rhs, x) || rhsIsQuadratic))
                || (rhsIsQuadratic
                && (lhs.isConstant() || LinearEquation.isLinear(lhs, x) || lhsIsQuadratic));
    }
View Full Code Here
122
123
124
125
126
127
128
129
130
131
132
133
134
135
        if (pattern.matches(expr)) {
            return true;
        } else if (expr instanceof Negation) {
            return isQuadratic(((Negation) expr).getChild(), x);
        } else if (expr instanceof Division) {
            Expression lhs = ((Division) expr).lhs();
            Expression rhs = ((Division) expr).rhs();
           
            return rhs.isConstant() && isQuadratic(lhs, x);
        } else if (expr instanceof Operation
                && expr.getPrecedence() == Precedence.Addition) {
            boolean isQuadratic = false;

            for (Expression t : ((Operation) expr).operands()) {
View Full Code Here
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
        super("sqrt", arg);
    }

    @Override
    public Expression evaluate() {
        Expression x = arg.evaluate();
       
        if (x instanceof ANumber) {
            ANumber a = (ANumber) x;
           
            if (a instanceof NaturalNumber) {
                return Naturals.sqrt((NaturalNumber) a);
            } else if (!a.isNegative()) {
                if (a instanceof IntegerNumber) {
                    return Naturals.sqrt(a.toNatural());
                } else if (a instanceof RationalNumber) {
                    return sqrt((RationalNumber) a);
                }
            }
        } else if (x instanceof Multiplication) {
            Expression e = sqrt((Multiplication) x);
           
            if (e instanceof Multiplication) {
                return e;
            }
        } else if (x instanceof Addition) {
            Expression factorized = ((Addition) x).factorize();
           
            if (factorized instanceof Multiplication) {
                Expression e = sqrt((Multiplication) factorized);

                if (e instanceof Multiplication) {
                    return e;
                }
            }
View Full Code Here
61
62
63
64
65
66
67
68
69
70
71
72
       
        return new Sqrt(x);
    }
   
    private Expression sqrt(Multiplication product) {
        Expression l = new Sqrt(product.lhs()).evaluate();
        Expression r = new Sqrt(product.rhs()).evaluate();

        if (!(l instanceof Sqrt && r instanceof Sqrt)) {
            return new Multiplication(l, r).evaluate();
        } else {
            return new Sqrt(product);
View Full Code Here
72
73
74
75
76
77
78
79
80
81
82
83
            return new Sqrt(product);
        }
    }
   
    private Expression sqrt(RationalNumber r) {
        Expression sqrtn = Naturals.sqrt(r.numerator().toNatural());
        Expression sqrtd = Naturals.sqrt(r.denominator());

        if (sqrtn instanceof NaturalNumber || sqrtd instanceof NaturalNumber) {
            return new Division(sqrtn, sqrtd).evaluate();
        } else {
            return new Sqrt(r);
View Full Code Here
655
656
657
658
659
660
661
662
663
664
665
            return false;
        }
   
        private boolean hasMatchingTerm() {
            ExpressionPattern p;
            Expression e;
           
            for (int i = 0; i < terms.size(); i++) { // looping over the patterns...
                if (matchingPatterns.containsKey(i)) {
                    continue;
                }
View Full Code Here
167
168
169
170
171
172
173
174
175
176
177
                reduced = pr.subtract(pl);
            } else {
                reduced = pl.subtract(pr);
            }
           
            Expression a = reduced.leadCoefficient();
           
            if (a instanceof ANumber && ((ANumber) a).isNegative()) {
                reduced = reduced.negate();
            }
View Full Code Here
52
53
54
55
56
57
58
59
60
61
            return fraction.matches(expr) && pattern.matches(fraction.denominator());
        }

        @Override
        public Expression apply() {
            Expression sqrt = new Sqrt(arg.hit());
           
            return new Division(new Multiplication(fraction.numerator(), sqrt),
                       new Multiplication(fraction.denominator(), sqrt));
        }
View Full Code Here
27
28
29
30
31
32
33
34
35
36
37
38
        this.base = base;
    }

    @Override
    public Expression evaluate() {
        Expression b = base.evaluate();
        Expression x = arg.evaluate();
       
        if (b instanceof ANumber && x instanceof ANumber) {
            if (b instanceof NaturalNumber && x instanceof NaturalNumber) {
                return Naturals.log((NaturalNumber) b, (NaturalNumber) x);
            } else if (b instanceof RealNumber && x instanceof RealNumber) {
View Full Code Here
190
191
192
193
194
195
196
197
198
        @Override
        public boolean matches(Expression expr) {
            p = (Polynomial) ((Equality) expr).lhs();
           
            Expression a = p.leadCoefficient();

            return new Sqrt(arg).matches(a);
        }
View Full Code Here
TOP

Related Classes of jmathexpr.Expression

  • jmathexpr.arithmetic.equation.AbsoluteValueEquation$Isolate$Addition
  • jmathexpr.arithmetic.equation.AbsoluteValueEquation$Isolate$Difference
  • jmathexpr.arithmetic.equation.AbsoluteValueEquation$IterativeRule
  • jmathexpr.arithmetic.equation.Equation
  • jmathexpr.arithmetic.equation.LinearEquation
  • jmathexpr.arithmetic.equation.LinearEquation$AxeB
  • jmathexpr.arithmetic.equation.LinearEquation$AxpBeC$SubtractionC
  • jmathexpr.arithmetic.equation.LinearEquation$AxpBeC$SubtractionX
  • jmathexpr.arithmetic.equation.LinearEquation$VariableOnBothSides
  • jmathexpr.arithmetic.equation.QuadraticEquation
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.