Provides access to members that control the classification methods.
Product Availability
Description
Classify objects apply one of several methods to statistically subdivide a set of numeric values into classes.
The IClassify interface is implemented by all the data classification objects (DefinedInterval, EqualInterval, NaturalBreaks, Quantile, StandardDeviation); this is the interface used to pass in histogram data and then classify it into breaks. The ClassID and MethodName properties are used by user interface dialog boxes to identify the classification object and establish what the classification is called.
In general, to classify a dataset, use this interface together with IClassBreaksRenderer. First, add data to the classification using SetHistogramData. Next, set the number of classes and generate breaks using Classify (typically use the same number of classes specified here for IClassBreaksRenderer.BreakCount). Then apply the classification to the renderer by cycling through ClassBreaks and setting each IClassBreaksRenderer.Break.
Members
Description | ||
---|---|---|
ClassBreaks | The array of class breaks (double). ClassBreaks(0) is the minimum value in the dataset, and subsequent breaks represent the upper limit of each class. | |
ClassID | The CLSID for the classification object. | |
Classify | Classifies data into the specified number of classes. | |
MethodName | The name of the classification method (based on choice of classification object). | |
SetHistogramData | Adds data in form of a histogram (array of values (doubles) and a paired array of frequencies (longs)) to the classification. |
CoClasses that implement IClassify
CoClasses and Classes | Description |
---|---|
DefinedInterval | Defines a defined interval classification method. |
EqualInterval | Defines an equal interval classification method. |
GeometricalInterval | Defines a geometrical interval classification method. |
NaturalBreaks | Defines a natural breaks classification method. |
Quantile | Defines a quantile classification method. |
StandardDeviation | Defines a standard deviation classification method. |
Remarks
Do not call IClassify.Classify for a StandardDeviation classification until you have set deviation properties using IDeviationInterval.
Instead of IClassify interface, implement IClassifyGEN interface that has been created to replace this one.
See Also
ClassBreaksRenderer Class | DefinedInterval Class | NaturalBreaks Class | StandardDeviation Class | Quantile Class | EqualInterval Class