C05.C05PB_FCN Delegate
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Depending upon the value of iflag, fcn must either return the values of the functions fi  at a point x or return the Jacobian at x.

Syntax

C#
public delegate void C05PB_FCN(
	int n,
	double[] x,
	double[] fvec,
	double[,] fjac,
	ref int iflag
)
Visual Basic (Declaration)
Public Delegate Sub C05PB_FCN ( _
	n As Integer, _
	x As Double(), _
	fvec As Double(), _
	fjac As Double(,), _
	ByRef iflag As Integer _
)
Visual C++
public delegate void C05PB_FCN(
	int n, 
	array<double>^ x, 
	array<double>^ fvec, 
	array<double,2>^ fjac, 
	int% iflag
)
F#
type C05PB_FCN = 
    delegate of 
        n:int * 
        x:float[] * 
        fvec:float[] * 
        fjac:float[,] * 
        iflag:int byref -> unit

Parameters

n
Type: System..::.Int32
On entry: n, the number of equations.
x
Type: array< System..::.Double >[]()[]
On entry: the components of the point x at which the functions or the Jacobian must be evaluated.
fvec
Type: array< System..::.Double >[]()[]
On entry: if iflag=2 , fvec contains the function values fix  and must not be changed.
On exit: if iflag=1  on entry, fvec must contain the function values fix  (unless iflag is set to a negative value by fcn).
fjac
Type: array< System..::.Double ,2>[,](,)[,]
On entry: if iflag=1 , fjac contains the value of ∂fi ∂xj  at the point x, for i,j=1,2,…,n , and must not be changed.
On exit: if iflag=2  on entry, fjac[i-1,j-1]  must contain the value of ∂fi ∂xj  at the point x, for i,j=1,2,…,n , (unless iflag is set to a negative value by fcn).
iflag
Type: System..::.Int32 %
On entry: iflag=1 or 2.
iflag=1
fvec is to be updated.
iflag=2
fjac is to be updated.
On exit: in general, iflag should not be reset by fcn. If, however, you wish to terminate execution (perhaps because some illegal point x has been reached), then iflag should be set to a negative integer. This value will be returned through ifail.

See Also