Returns the values of the partial derivative of the tensor-product spline of an array of points.

Namespace: Imsl.Math
Assembly: ImslCS (in ImslCS.dll) Version: 6.5.0.0

Syntax

C#
public virtual double[,] Derivative(
	double[] xVec,
	double[] yVec,
	int xPartial,
	int yPartial
)
Visual Basic (Declaration)
Public Overridable Function Derivative ( _
	xVec As Double(), _
	yVec As Double(), _
	xPartial As Integer, _
	yPartial As Integer _
) As Double(,)
Visual C++
public:
virtual array<double,2>^ Derivative(
	array<double>^ xVec, 
	array<double>^ yVec, 
	int xPartial, 
	int yPartial
)

Parameters

xVec
Type: array< System..::.Double >[]()[]
A double array specifying the x-coordinates at which the spline is to be evaluated.
yVec
Type: array< System..::.Double >[]()[]
A double array specifying the y-coordinates at which the spline is to be evaluated.
xPartial
Type: System..::.Int32
An int scalar specifying the x-partial derivative.
yPartial
Type: System..::.Int32
An int scalar specifying the y-partial derivative.

Return Value

An double matrix containing the values of the partial derivatives
\frac{{\partial ^{i + j} s}}{{\partial ^i x\,\,\partial ^j y}}
where i = xPartial and j = yPartial, at each (x, y).

See Also