DELTAY

Purpose:

Returns the delta y increment of a table.

Syntax:

DELTAY(series)

series

Optional. A series or table. Defaults to the current Window.

Returns:

A scalar.

Example:

W1: randn(10)

W2: spline2(W1, 4)

deltay(W1) == 1

deltay(W2) == 0.25

W1 contains a 10x10 array of normally distributed random values. W2 performs a 4x cubic spline interpolation. Because the interpolation preserves the extent of the original data, both the delta X and delta Y of the result are adjusted.

Remarks:

DELTAY returns 1.0 for a standard series.