E04.E04YA_LSQFUN Delegate
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lsqfun must calculate the vector of values fix and their first derivatives ∂fi ∂xj  at any point x. (The minimization methods mentioned in [Description] give you the option of resetting a parameter to terminate immediately. e04ya will also terminate immediately, without finishing the checking process, if the parameter in question is reset.)

Syntax

C#
public delegate void E04YA_LSQFUN(
	ref int iflag,
	int m,
	int n,
	double[] xc,
	double[] fvec,
	double[,] fjac
)
Visual Basic (Declaration)
Public Delegate Sub E04YA_LSQFUN ( _
	ByRef iflag As Integer, _
	m As Integer, _
	n As Integer, _
	xc As Double(), _
	fvec As Double(), _
	fjac As Double(,) _
)
Visual C++
public delegate void E04YA_LSQFUN(
	int% iflag, 
	int m, 
	int n, 
	array<double>^ xc, 
	array<double>^ fvec, 
	array<double,2>^ fjac
)
F#
type E04YA_LSQFUN = 
    delegate of 
        iflag:int byref * 
        m:int * 
        n:int * 
        xc:float[] * 
        fvec:float[] * 
        fjac:float[,] -> unit

Parameters

iflag
Type: System..::.Int32 %
On entry: to lsqfun, iflag will be set to 2.
On exit: if you reset iflag to some negative number in lsqfun and return control to e04ya, the method will terminate immediately with ifail set to your setting of iflag.
m
Type: System..::.Int32
On entry: the numbers m of residuals.
n
Type: System..::.Int32
On entry: the numbers n of variables.
xc
Type: array< System..::.Double >[]()[]
On entry: x, the point at which the values of the fi and the ∂fi ∂xj  are required.
fvec
Type: array< System..::.Double >[]()[]
On exit: unless iflag is reset to a negative number, fvec[i-1] must contain the value of fi at the point x, for i=1,2,…,m.
fjac
Type: array< System..::.Double ,2>[,](,)[,]
On exit: unless iflag is reset to a negative number, fjac[i-1,j-1] must contain the value of ∂fi ∂xj  at the point x, for i=1,2,…,m and j=1,2,…,n.

See Also