PO.Math.DataDiff Function

Description:

Calculates derivative for data samples at point t with smoothing.

Excel Function Syntax:

=PO.Math.DataDiff(x_values, y_values, t, l)

Parameters:

Parameter	Description
x_values	Sample points (N), sorted ascending.
y_values	Sample values (N) of each segment starting at the corresponding sample point.
t	Point t to calculate derivative at.
l	Minimum distance between abscissa of the points and that of point t, l=0 for no smoothing, [dimensionless].