StatBean Name: Percentiles

Purpose: Calculates percentiles for a single column of numeric data.

DataSource: Any.

Read/Write Properties

Name	Type	Description	Possible Values	Default Value
tablewiseExclusion	boolean	Whether all rows of the data table containing a missing value in any column should be excluded from the plot.	true,false	false
xVariableName	String	The name of the column with data values to be plotted on the horizontal axis.	Any string.	"X"

Other Public Methods

Name	Description	Arguments	Return Value
double getPercentile(double p)	Returns the p-th percentile.	Percentage at which percentile will be calculated.	p-th percentile

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
Percentiles percentiles1 = new STATBEANS.Percentiles();

//set the name of the data column
percentiles1.setXVariableName("mpg");

//make the calculation bean a listener
fileDataSource1.addDataChangeListener(percentiles1.listenerForDataChange);

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

//retrieve the percentiles
double p10=percentiles1.getPercentile(10.0);
double p50=percentiles1.getPercentile(50.0);
double p90=percentiles1.getPercentile(90.0);