Returns the value of the partial derivative of the tensor-product spline at the point (x, y).

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

Syntax

C#
public virtual double Derivative(
	double x,
	double y,
	int xPartial,
	int yPartial
)
Visual Basic (Declaration)
Public Overridable Function Derivative ( _
	x As Double, _
	y As Double, _
	xPartial As Integer, _
	yPartial As Integer _
) As Double
Visual C++
public:
virtual double Derivative(
	double x, 
	double y, 
	int xPartial, 
	int yPartial
)

Parameters

x
Type: System..::.Double
A double scalar specifying the x-coordinate of the evaluation point for the tensor-product spline.
y
Type: System..::.Double
A double scalar specifying the y-coordinate of the evaluation point for the tensor-product spline.
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

A double scalar containing the value of the partial derivative
\frac{{\partial ^{i + j} s}}{{\partial ^i x\,\,\partial ^j y}}
where i = xPartial and j = yPartial, at (x, y).

See Also