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Spline2DDerivative Method (Double, Double, Int32, Int32)
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: 6.5.2.0
Syntax
public virtual double Derivative(
	double x,
	double y,
	int xPartial,
	int yPartial
)

Parameters

x
Type: SystemDouble
A double scalar specifying the x-coordinate of the evaluation point for the tensor-product spline.
y
Type: SystemDouble
A double scalar specifying the y-coordinate of the evaluation point for the tensor-product spline.
xPartial
Type: SystemInt32
An int scalar specifying the x-partial derivative.
yPartial
Type: SystemInt32
An int scalar specifying the y-partial derivative.

Return Value

Type: Double
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