public void EqualsTest2()
{
var sine = new Sin(new Number(2));
var ln = new Ln(new Number(2));
Assert.NotEqual<IExpression>(sine, ln);
}
public void DerivativeTest1()
{
IExpression exp = new Sin(new Variable("x"));
IExpression deriv = exp.Differentiate();
Assert.AreEqual("cos(x) * 1", deriv.ToString());
}
public void ResultTest()
{
var exp = new Sin(new Variable("x"));
var result = new ExpressionResult(exp);
Assert.Equal(exp, result.Result);
}
public void ToStringTest()
{
var exp = new Sin(new Variable("x"));
var result = new ExpressionResult(exp);
Assert.Equal("sin(x)", result.ToString());
}
public void CloneTest()
{
var exp = new Sin(new Number(1));
var clone = exp.Clone();
Assert.Equal(exp, clone);
}
public void EqualsTest1()
{
var sine1 = new Sin(new Number(2));
var sine2 = new Sin(new Number(2));
Assert.Equal(sine1, sine2);
}
public void EqualsTest2()
{
var sine = new Sin(new Number(2));
var ln = new Ln(new Number(2));
Assert.AreNotEqual(sine, ln);
}
public void DerivativeTest2()
{
IExpression exp = new Sin(new Mul(new Number(2), new Variable("x")));
IExpression deriv = exp.Differentiate();
Assert.AreEqual("cos(2 * x) * (2 * 1)", deriv.ToString());
}
public void ExecuteComplexNumberTest()
{
var complex = new Complex(3, 2);
var exp = new Sin(new ComplexNumber(complex));
var result = (Complex)exp.Execute();
Assert.Equal(Complex.Sin(complex), result);
Assert.Equal(0.53092108624851986, result.Real, 15);
Assert.Equal(-3.59056458998578, result.Imaginary, 15);
}
public void DefineFuncTest()
{
var uf = new UserFunction("s", new IExpression[0], 0);
var func = new Sin(new Number(1));
var exp = new Define(uf, func);
var parameters = new ExpressionParameters();
var result = exp.Execute(parameters);
Assert.Equal(func, parameters.Functions[uf]);
Assert.Equal("The expression 'sin(1)' was assigned to the function 's()'.", result);
}
public void DefineFuncWithParamsTest()
{
var uf = new UserFunction("s", 1);
var func = new Sin(new Variable("x"));
var exp = new Define(uf, func);
var parameters = new ExpressionParameters();
var result = exp.Execute(parameters);
Assert.Equal(func, parameters.Functions[uf]);
Assert.Equal("The expression 'sin(x)' was assigned to the function 's(x1)'.", result);
}
public void DerivativeTest3()
{
// sin(2x)
Number num = new Number(2);
Variable x = new Variable("x");
Mul mul = new Mul(num, x);
IExpression exp = new Sin(mul);
IExpression deriv = exp.Differentiate();
Assert.AreEqual("cos(2 * x) * (2 * 1)", deriv.ToString());
num.Value = 3;
Assert.AreEqual("sin(3 * x)", exp.ToString());
Assert.AreEqual("cos(2 * x) * (2 * 1)", deriv.ToString());
}
public void SinArcsin()
{
var exp = new Sin(new Arcsin(new Variable("x")));
var expected = new Variable("x");
SimpleTest(exp, expected);
}
public void SinPartialDerivativeTest2()
{
var exp = new Sin(new Mul(new Variable("x"), new Variable("y")));
var deriv = Differentiate(exp, new Variable("y"));
Assert.Equal("cos(x * y) * x * 1", deriv.ToString());
}
public void SinPartialDerivativeTest3()
{
var exp = new Sin(new Variable("y"));
var deriv = Differentiate(exp);
Assert.Equal("0", deriv.ToString());
}
public void SinDerivativeTest2()
{
var exp = new Sin(new Mul(new Number(2), new Variable("x")));
var deriv = Differentiate(exp);
Assert.Equal("cos(2 * x) * 2 * 1", deriv.ToString());
}
public void SinDerivativeTest3()
{
// sin(2x)
var num = new Number(2);
var x = new Variable("x");
var mul = new Mul(num, x);
var exp = new Sin(mul);
var deriv = Differentiate(exp);
Assert.Equal("cos(2 * x) * 2 * 1", deriv.ToString());
num.Value = 3;
Assert.Equal("sin(3 * x)", exp.ToString());
Assert.Equal("cos(2 * x) * 2 * 1", deriv.ToString());
}
/// <summary>
/// Differentiates the specified expression.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="variable">The variable.</param>
/// <returns>Returns the derivative.</returns>
protected virtual IExpression Sin(Sin expression, Variable variable)
{
var cos = new Cos(expression.Argument.Clone());
var mul = new Mul(cos, _Differentiate(expression.Argument.Clone(), variable));
return mul;
}
public void SinDerivativeTest1()
{
var exp = new Sin(new Variable("x"));
var deriv = Differentiate(exp);
Assert.Equal("cos(x) * 1", deriv.ToString());
}
/// <summary>
/// Differentiates the specified expression.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="variable">The variable.</param>
/// <returns>Returns the derivative.</returns>
protected virtual IExpression Cos(Cos expression, Variable variable)
{
var sine = new Sin(expression.Argument.Clone());
var multiplication = new Mul(sine, _Differentiate(expression.Argument.Clone(), variable));
var unMinus = new UnaryMinus(multiplication);
return unMinus;
}
/// <summary>
/// Differentiates the specified expression.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="variable">The variable.</param>
/// <returns>Returns the derivative.</returns>
protected virtual IExpression Cot(Cot expression, Variable variable)
{
var sine = new Sin(expression.Argument.Clone());
var involution = new Pow(sine, new Number(2));
var division = new Div(_Differentiate(expression.Argument.Clone(), variable), involution);
var unMinus = new UnaryMinus(division);
return unMinus;
}
public void SinPartialDerivativeTest2()
{
IExpression exp = new Sin(new Mul(new Variable("x"), new Variable("y")));
IExpression deriv = Differentiate(exp, new Variable("y"));
Assert.AreEqual("cos(x * y) * (x * 1)", deriv.ToString());
}
public void SinPartialDerivativeTest3()
{
IExpression exp = new Sin(new Variable("y"));
IExpression deriv = Differentiate(exp);
Assert.AreEqual("0", deriv.ToString());
}
public void HasVarTest1()
{
var exp = new Sin(new Mul(new Number(2), new Variable("x")));
bool expected = Helpers.HasVariable(exp, new Variable("x"));
Assert.Equal(expected, true);
}
/// <summary>
/// Creates an expression object from <see cref="FunctionToken"/>.
/// </summary>
/// <param name="token">The function token.</param>
/// <returns>An expression.</returns>
protected virtual IExpression CreateFunction(FunctionToken token)
{
IExpression exp;
switch (token.Function)
{
case Functions.Add:
exp = new Add(); break;
case Functions.Sub:
exp = new Sub(); break;
case Functions.Mul:
exp = new Mul(); break;
case Functions.Div:
exp = new Div(); break;
case Functions.Pow:
exp = new Pow(); break;
case Functions.Absolute:
exp = new Abs(); break;
case Functions.Sine:
exp = new Sin(); break;
case Functions.Cosine:
exp = new Cos(); break;
case Functions.Tangent:
exp = new Tan(); break;
case Functions.Cotangent:
exp = new Cot(); break;
case Functions.Secant:
exp = new Sec(); break;
case Functions.Cosecant:
exp = new Csc(); break;
case Functions.Arcsine:
exp = new Arcsin(); break;
case Functions.Arccosine:
exp = new Arccos(); break;
case Functions.Arctangent:
exp = new Arctan(); break;
case Functions.Arccotangent:
exp = new Arccot(); break;
case Functions.Arcsecant:
exp = new Arcsec(); break;
case Functions.Arccosecant:
exp = new Arccsc(); break;
case Functions.Sqrt:
exp = new Sqrt(); break;
case Functions.Root:
exp = new Root(); break;
case Functions.Ln:
exp = new Ln(); break;
case Functions.Lg:
exp = new Lg(); break;
case Functions.Lb:
exp = new Lb(); break;
case Functions.Log:
exp = new Log(); break;
case Functions.Sineh:
exp = new Sinh(); break;
case Functions.Cosineh:
exp = new Cosh(); break;
case Functions.Tangenth:
exp = new Tanh(); break;
case Functions.Cotangenth:
exp = new Coth(); break;
case Functions.Secanth:
exp = new Sech(); break;
case Functions.Cosecanth:
exp = new Csch(); break;
case Functions.Arsineh:
exp = new Arsinh(); break;
case Functions.Arcosineh:
exp = new Arcosh(); break;
case Functions.Artangenth:
exp = new Artanh(); break;
case Functions.Arcotangenth:
exp = new Arcoth(); break;
case Functions.Arsecanth:
exp = new Arsech(); break;
case Functions.Arcosecanth:
exp = new Arcsch(); break;
case Functions.Exp:
exp = new Exp(); break;
case Functions.GCD:
exp = new GCD(); break;
case Functions.LCM:
exp = new LCM(); break;
case Functions.Factorial:
exp = new Fact(); break;
case Functions.Sum:
exp = new Sum(); break;
case Functions.Product:
exp = new Product(); break;
case Functions.Round:
exp = new Round(); break;
case Functions.Floor:
exp = new Floor(); break;
case Functions.Ceil:
exp = new Ceil(); break;
case Functions.Derivative:
exp = new Derivative(); break;
case Functions.Simplify:
exp = new Simplify(); break;
case Functions.Del:
exp = new Del(); break;
case Functions.Define:
exp = new Define(); break;
case Functions.Vector:
exp = new Vector(); break;
case Functions.Matrix:
exp = new Matrix(); break;
case Functions.Transpose:
exp = new Transpose(); break;
case Functions.Determinant:
exp = new Determinant(); break;
case Functions.Inverse:
exp = new Inverse(); break;
case Functions.If:
exp = new If(); break;
case Functions.For:
exp = new For(); break;
case Functions.While:
exp = new While(); break;
case Functions.Undefine:
exp = new Undefine(); break;
case Functions.Im:
exp = new Im(); break;
case Functions.Re:
exp = new Re(); break;
case Functions.Phase:
exp = new Phase(); break;
case Functions.Conjugate:
exp = new Conjugate(); break;
case Functions.Reciprocal:
exp = new Reciprocal(); break;
case Functions.Min:
exp = new Min(); break;
case Functions.Max:
exp = new Max(); break;
case Functions.Avg:
exp = new Avg(); break;
case Functions.Count:
exp = new Count(); break;
case Functions.Var:
exp = new Var(); break;
case Functions.Varp:
exp = new Varp(); break;
case Functions.Stdev:
exp = new Stdev(); break;
case Functions.Stdevp:
exp = new Stdevp(); break;
default:
exp = null; break;
}
var diff = exp as DifferentParametersExpression;
if (diff != null)
diff.ParametersCount = token.CountOfParams;
return exp;
}
public void CalculateDegreeTest()
{
IExpression exp = new Sin(new Number(1));
Assert.AreEqual(Math.Sin(1 * Math.PI / 180), exp.Calculate(AngleMeasurement.Degree));
}
public void ExecuteDegreeTest()
{
var exp = new Sin(new Number(1));
Assert.Equal(Math.Sin(1 * Math.PI / 180), exp.Execute(AngleMeasurement.Degree));
}
public void ExecuteRadianTest()
{
var exp = new Sin(new Number(1));
Assert.Equal(Math.Sin(1), exp.Execute(AngleMeasurement.Radian));
}
public void CalculateRadianTest()
{
IExpression exp = new Sin(new Number(1));
Assert.AreEqual(Math.Sin(1), exp.Calculate(AngleMeasurement.Radian));
}
public void HasVarTest2()
{
var exp = new Sin(new Mul(new Number(2), new Number(3)));
bool expected = Parser.HasVar(exp, new Variable("x"));
Assert.AreEqual(expected, false);
}
