Function Math.Get Equation Solver Method
Definition
Assembly: Extreme.Numerics (in Extreme.Numerics.dll) Version: 8.1.23
Overload List
Get | Returns an EquationSolver suitable for solving an equation using the specified information. |
Get | Finds a zero of a function starting from an initial guess. |
Get | Finds a zero of a function when the solution is known to lie within a specified interval. |
Get | Finds a zero of a function starting from an initial guess. |
Get | Finds a zero of a function starting from an initial guess. |
GetEquationSolver(Func<Double, Double>, Double)
public static EquationSolver GetEquationSolver(
this Func<double, double> targetFunction,
double initialGuess
)
Parameters
- targetFunction Func<Double, Double>
- A delegate that represents a function of one variable that specifies the function on the left-hand side of the equation.
- initialGuess Double
- An initial guess for ther zero.
Return Value
EquationSolverAn EquationSolver object that is set up to solve an equation for the specifed target function.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type Func<Double, Double>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).Remarks
Use this method when you have very little information about the location of the zero, but you need more control over the solution process. For example, you may want to specify a different RelativeTolerance.
GetEquationSolver(Func<Vector<Double>, Double>[], Func<Vector<Double>, Vector<Double>, Vector<Double>>[], Vector<Double>)
public static EquationSystemSolver GetEquationSolver(
this Func<Vector<double>, double>[] targetFunctions,
Func<Vector<double>, Vector<double>, Vector<double>>[] gradientsOfTargetFunctions,
Vector<double> initialGuess
)
Parameters
- targetFunctions Func<Vector<Double>, Double>[]
- A delegate that represents a multivariate function returning a vector that specifies the function on the left-hand side of the equation.
- gradientsOfTargetFunctions Func<Vector<Double>, Vector<Double>, Vector<Double>>[]
- A delegate that represents a multivariate function that specifies the gradient function of targetFunctions.
- initialGuess Vector<Double>
- An initial guess for ther zero.
Return Value
EquationSystemSolverThe best approximation to a zero of targetFunctions.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type Func<Vector<Double>, Double>[]. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).Remarks
Use this method when you have very little information about the location of the zero, but you need more control over the solution process. For example, you may want to specify a different RelativeTolerance.
GetEquationSolver(Func<Double, Double>, Double, Double)
public static EquationSolver GetEquationSolver(
this Func<double, double> targetFunction,
double lowerBound,
double upperBound
)
Parameters
- targetFunction Func<Double, Double>
- A delegate that represents a function of one variable that specifies the function on the left-hand side of the equation.
- lowerBound Double
- The lower bound of the interval that contains the root.
- upperBound Double
- The upper bound of the interval that contains the root.
Return Value
EquationSolverThe best approximation to a zero of targetFunction, but you need more control over the solution process. For example, you may want to specify a different RelativeTolerance.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type Func<Double, Double>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).GetEquationSolver(Func<Double, Double>, Func<Double, Double>, Double)
public static EquationSolver GetEquationSolver(
this Func<double, double> targetFunction,
Func<double, double> derivativeOfTargetFunction,
double initialGuess
)
Parameters
- targetFunction Func<Double, Double>
- A delegate that represents a function of one variable that specifies the function on the left-hand side of the equation.
- derivativeOfTargetFunction Func<Double, Double>
- A delegate that represents a function of one variable that specifies the derivative function of targetFunction.
- initialGuess Double
- An initial guess for ther zero.
Return Value
EquationSolverThe best approximation to a zero of targetFunction.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type Func<Double, Double>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).Remarks
Use this method when you have very little information about the location of the zero, but you need more control over the solution process. For example, you may want to specify a different RelativeTolerance.
GetEquationSolver(Func<Vector<Double>, Vector<Double>, Vector<Double>>, Func<Vector<Double>, Matrix<Double>, Matrix<Double>>, Vector<Double>)
public static EquationSystemSolver GetEquationSolver(
this Func<Vector<double>, Vector<double>, Vector<double>> targetFunction,
Func<Vector<double>, Matrix<double>, Matrix<double>> jacobianFunction,
Vector<double> initialGuess
)
Parameters
- targetFunction Func<Vector<Double>, Vector<Double>, Vector<Double>>
- A delegate that represents a multivariate function returning a vector that computes the values on the left-hand side of the equations.
- jacobianFunction Func<Vector<Double>, Matrix<Double>, Matrix<Double>>
- A delegate that represents a multivariate function returning a matrix in its second argument that computes the Jacobian of targetFunction.
- initialGuess Vector<Double>
- An initial guess for the solution.
Return Value
EquationSystemSolverThe best approximation to a zero of targetFunction.