---
title: Probability Density Function Calculator | Density Trace STATBEANS®
description: You can use Statgraphics as a probability density function calculator! Perform density trace visualization with this plugin visualization software.
---

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# DensityTrace STATBEAN®

 

**Purpose:** This probability density function calculator estimates the probability density function for a single column of numeric data. Allows Statgraphics software to create density trace plots.

**DataSource for the Probability Density Function Calculator:** Any. 

![densitytrace](https://www.statgraphics.com/hs-fs/hubfs/densitytrace.gif?width=380&name=densitytrace.gif)

**Density Trace Read/Write Properties**

| **Name** | **Type** | **Description** | **Possible Values** | **Default Value** |
| --- | --- | --- | --- | --- |
| columnNames | String array | The names of the columns (if more than one) to be analyzed. | One or more strings. | {""} |
| intervalWidth | int | Percentage of data used to estimate trace at each location. | 1-99 | 40 |
| method | String | Type of method used to estimate the trace. | "Boxcar","Cosine" | "Cosine" |
| resolution | int | For continuous distributions, the number of points at which the function is calculated. | 50+ | 300 |
| 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 (if only one) to be plotted on the horizontal axis. | Any string. | "" |

**Probability Density Function Calculator 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 chart bean   
DensityTrace densitytrace1 = new STATBEANS.DensityTrace(); 

//set the column to be plotted   
densitytrace1.setXVariableName("horsepower"); 

//show the plot   
add(densitytrace1); 

//make the plot bean a listener for changes in the FileDataSource bean   
fileDataSource1.addDataChangeListener(densitytrace1.listenerForDataChange); 

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

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