You must supply this method to calculate the values of the function Fx and its first derivatives ∂F∂xj at any point x. It should be tested separately before being used in conjunction with e04ly (see the E04 class).

Syntax

C#
public delegate void E04LY_FUNCT2(
	int n,
	double[] xc,
	ref double fc,
	double[] gc
)
Visual Basic
Public Delegate Sub E04LY_FUNCT2 ( _
	n As Integer, _
	xc As Double(), _
	ByRef fc As Double, _
	gc As Double() _
)
Visual C++
public delegate void E04LY_FUNCT2(
	int n, 
	array<double>^ xc, 
	double% fc, 
	array<double>^ gc
)
F#
type E04LY_FUNCT2 = 
    delegate of 
        n : int * 
        xc : float[] * 
        fc : float byref * 
        gc : float[] -> unit

Parameters

n
Type: System..::..Int32
On entry: the number n of variables.
xc
Type: array<System..::..Double>[]()[][]
On entry: the point x at which the function and its derivatives are required.
fc
Type: System..::..Double%
On exit: the value of the function F at the current point x.
gc
Type: array<System..::..Double>[]()[][]
On exit: gc[j-1] must be set to the value of the first derivative ∂F∂xj at the point x, for j=1,2,…,n.

See Also