Package org.omegahat.Graphics.Plots.DataStructures

Classes describing data contents used in particular plot types.

See:
Description

Interface Summary

DynamicHistogramBinInt	Interface defining additional methods to allow adding data to a HistogramBinInt.
HistogramBinInt	Interface describing a bin within a histogram, providing information about the start and end points of the bin and its height.
HistogramContentsInt	An interface defining the minimum set of methods required to extract the necessary information about a variable to draw a histogram for it.

Class Summary

HistogramBin	the primitive element of a histogram description, storing the location and height/count for an individual segment or bin.
HistogramContents	a class is used to store the description of a histogram in terms of its bins and the maximum height of all bins.
UnivariateSummary	a class used to compute and store the basic summary statistics from a set of numbers.

Package org.omegahat.Graphics.Plots.DataStructures Description

Classes describing data contents used in particular plot types.

These are utilities, not generally directly dependent on the graphical context, but useful to have in order to reduce the underlying statistical data to summaries suitable for particular plots.

The plotting methods for higher-level plots may compute these summaries directly. The methods in this package, however, may be useful to do slightly nonstandard operations.

The term device is used in Omegahat in a slightly different sense than in some earlier systems, linked closely to the approach to graphics in Java. A device is an object with methods for the essential graphical operations. The basic OutputDevice interface defines these operations. A class implementing this interface will interpret the operations suitably; for example, in terms of Java AWT basic graphics.

In contrast to older systems, however, the objects representing devices themselves can be structured in very flexible ways, making use of the features of Java's AWT and Swing packages, for example.

The complementary part of Omegahat graphics are the graphics objects, containing the specific visualization information. Actual graphical display comes from linking graphics objects to devices. In many applications, there will be wide range of possible implementations: The comparison of two forms of box plot (Boxplot and BoxPlot) gives a simple example of the choices.