ClassifyEqualInterval

classify-functions ClassifyEqualInterval

syntax

• ClassifyEqualInterval(a, domain-unit)

definition

ClassifyEqualInterval(a, domain unit) results in a data-item with class breaks, based on a equal interval distribution of classes. The resulting values-unit is the values unit of data item a, the resulting domain unit is thedomain unit argument.

• a: numeric data item to be classified
• domain unit: determining the number of class breaks.

description

An equal distribution of classes means the data item to be classified is split up in classes with, as far as possible, an equal interval size of each class.

The same function can also be applied from the GUI, by requesting the Palette Editor of a map layer and activate the Classify > Equal Interval classification.

The ClassifyEqualInterval results in a set of ClassBreaks that can be used in the classify function to classify a data item.

applies to

• data item a with Numeric value type
• domain unit with value-type from group CanBeDomainUnit

since version

7.019

example

attribute<nrPersons> classifyEiNrInh (inh_4K) := ClassifyEqualInterval(NrInh, inh_4K);

Table inh_4K, nr of rows = 4

Table District, nr of rows = 15