**5.7****
****Generic Functions** (.NET, C#, CSharp, VB, Visual Basic, F#)

**NMath** provides convenience
methods for applying unary and binary functions to elements of a vector.
Each of these methods takes a function delegate. The Apply()
method returns a new vector whose contents are the result of applying
the given function to each element of the vector. The Transform()
method modifies a vector object by applying the given function to each
of its elements. For example, assuming MyFunc
is a function that takes a double and returns
a double:

Code Example – C# vector

var v = new DoubleVector ( 10, 0, -1 ); // Construct a delegate for MyFunc Func<double, double> MyFuncDelegate = new Func<double, double>( MyFunc ); // Construct a new vector whose values are the result of applying // MyFunc to the values in vector v. v remains unchanged. DoubleVector w = v.Apply( MyFuncDelegate ); // Transform the contents of v. v.Transform( MyFuncDelegate ); v == w; // true!

Code Example – VB vector

Dim V As New DoubleVector(10, 0, -1) ' Construct a delegate for MyFunc Dim MyFuncDelegate As New Func(Of Double, Double)(AddressOf MyFunc) ' Construct a new vector whose values are the result of applying ' MyFunc to the values in vector v. v remains unchanged. Dim W As DoubleVector = V.Apply(MyFuncDelegate) ' Transform the contents of v. V.Transform(MyFuncDelegate) V = W ' true!

**NMath** provides
delegates for many commonly used math functions in the **NMathFunctions** class.