lsqfun must calculate the vector of values fix and their first derivatives ∂fi∂xj at any point x. (e04he gives you the option of resetting parameters of lsqfun to cause the minimization process to terminate immediately. e04yb will also terminate immediately, without finishing the checking process, if the parameter in question is reset.)

Syntax

C#
public delegate void E04YB_LSQFUN(
	ref int iflag,
	int m,
	int n,
	double[] xc,
	double[] fvec,
	double[,] fjac
)
Visual Basic
Public Delegate Sub E04YB_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 E04YB_LSQFUN(
	int% iflag, 
	int m, 
	int n, 
	array<double>^ xc, 
	array<double>^ fvec, 
	array<double,2>^ fjac
)
F#
type E04YB_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 e04yb, 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: the point x 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