create varX = new Variable.Local<Rational>("x");

Discussion in 'Java' started by Mohamad Khaleghy, May 23, 2014.

  1. Hi
    I have sample code downloaded for using jscience.

    But when I use it, it gives this message:

    E/AndroidRuntime(1296): java.lang.NoClassDefFoundError:eek:rg.jscience.mathematics.function.Variable$Local

    Am i I missing something? Of course I imported the jscience jar lib to my project. But still can't figure this out.

    Variable.Local<Rational> varX = new Variable.Local<Rational>("x");
    Variable.Local<Rational> varY = new Variable.Local<Rational>("y");

    // f(x, y) = x² + x·y + 1;
    Polynomial<Rational> x = Polynomial.valueOf(Rational.ONE, varX);
    Polynomial<Rational> y = Polynomial.valueOf(Rational.ONE, varY);
    Polynomial<Rational> fx_y = x.pow(2).plus(x.times(y)).plus(Rational.ONE);
    System.out.println("f(x,y) = " + fx_y);

    // Evaluates f(1,0)
    System.out.println("f(1,0) = " + fx_y.evaluate(Rational.ONE, Rational..ZERO));

    // Calculates df(x,y)/dx
    System.out.println("df(x,y)/dx = " + fx_y.differentiate(varX));
    Mohamad Khaleghy, May 23, 2014
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  2. Mohamad Khaleghy

    Joerg Meier Guest

    Importing it lets you compile. Are you also making sure that they get
    exported into the final apk ?

    Liebe Gruesse,
    Joerg Meier, May 23, 2014
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