public void DerivativeTest2() { IExpression exp = new Exp(new Mul(new Number(2), new Variable("x"))); IExpression deriv = exp.Differentiate(); Assert.AreEqual("(2 * 1) * exp(2 * x)", deriv.ToString()); }
public void DerivativeTest1() { IExpression exp = new Exp(new Variable("x")); IExpression deriv = exp.Differentiate(); Assert.AreEqual("1 * exp(x)", deriv.ToString()); }
public void DerivativeTest3() { // exp(2x) Number num = new Number(2); Variable x = new Variable("x"); Mul mul = new Mul(num, x); IExpression exp = new Exp(mul); IExpression deriv = exp.Differentiate(); Assert.AreEqual("(2 * 1) * exp(2 * x)", deriv.ToString()); num.Value = 6; Assert.AreEqual("exp(6 * x)", exp.ToString()); Assert.AreEqual("(2 * 1) * exp(2 * x)", deriv.ToString()); }
public void PartialDerivativeTest3() { IExpression exp = new Exp(new Variable("x")); IExpression deriv = exp.Differentiate(new Variable("y")); Assert.AreEqual("0", deriv.ToString()); }
public void PartialDerivativeTest1() { IExpression exp = new Exp(new Mul(new Variable("x"), new Variable("y"))); IExpression deriv = exp.Differentiate(); Assert.AreEqual("(1 * y) * exp(x * y)", deriv.ToString()); }