link.influence Function (GPL)

Syntax

link.influence(<algebra>)

or 

link.influence(<binning function>)

or 

link.influence(<statistic function>)

<algebra>. Graph algebra, such as x*y. Refer to Brief Overview of GPL Algebra for an introduction to graph algebra.

<binning function>. A binning function.

<statistic function>. Another statistic function. The result of the embedded statistic is used to calculate link.influence.

Description

Calculates a sphere of influence graph for the values. This function is typically used with the edge graphic element. The sphere of influence graph connects values if the distance between two values is less than or equal to the sum of the nearest neighbor distances for the two values. The nearest neighbor distance for a value is the distance between it and the value closest to it.

Examples

Figure 1. Example: Creating a sphere of influence graph
ELEMENT: edge(position(link.influence(x*y)))

Statistic Functions

See GPL Functions .