diversity

Details

Last Updated on Tuesday, 29 January 2013 08:55

syntax

• diversity(sourcegrid, b, c)
  

definition

diversity(sourcegrid, b, c) results in a new grid attribute with the number of different values in the neighbourhood of each cell of the sourcegrid attribute.Constant or parameter b is the radius in number of cells, defining the size of the neighbourhood. Constant or parameter c indicates if a circle (value 1) or a square (value 0) is used to define the shape of the neighbourhood. The resulting item has the same domain unit as the sourcegrid attribute and a uint8 or unit32 value type (based on the value type of the sourcegrid attribute).

applies to

Attribute sourcegrid with value types:

• uint8
• uint32

Parameters or constants b and c with value types:

• uint16

conditions

The domain unit of the sourcegrid attribute needs to be of the value type PointGroup and CanBeDomainUnit.

since version

5.15

example

attribute<uint32> diversitygrid(GridDomain)
:  expr = "diversity(sourcegrid, uint16(2), uint16(1))";