StatBean Name: FrequencyPolygon

Purpose: Constructs a frequency polygon or cumulative distribution function to show the distribution of numeric data.

DataSource: Tabulation.

Read/Write Properties

Name	Type	Description	Possible Values	Default Value
cumulative	boolean	Whether to plot cumulative frequencies.	true,false	false
scaleByPercentage	boolean	Whether to scale the axes by percentage rather than frequency.	true,false	false

Code Sample

//create a datasource bean
FileDataSource fileDataSource1 = new STATBEANS.FileDataSource();

//set the file name to be read
fileDataSource1.setFileName("c:\\statbeans\\samples\\cardata.txt");

//create a calculation bean
Tabulation tabulation1 = new STATBEANS.Tabulation();

//set the column to be tabulated
tabulation1.setXVariableName("mpg");

//set the type of tabulation and the limits
tabulation1.setDataType("Continuous");
tabulation1.setFrom(0.0);
tabulation1.setTo(60.0);
tabulation1.setBy(5.0);

//create a chart bean
FrequencyPolygon polygon1 = new STATBEANS.FrequencyPolygon();

//make the calculation bean a listener for changes in the FileDataSource bean
fileDataSource1.addDataChangeListener(tabulation1.listenerForDataChange);

//make the plot bean a listener for changes in the tabulation bean
tabulation1.addDataChangeListener(polygon1.listenerForDataChange);

//instruct the fileDataSource bean to read the file
fileDataSource1.readData();