An apparatus has an input configured to obtain various categories of naïve Bayes model data, and a formatter operatively coupled with the input. The formatter is configured to generate a format for displaying the naïve Bayes model data on a display device. The apparatus also has a displayer operatively coupled with the formatter. The displayer is configured to display the naïve Bayes model data in a two dimensional manner in the format on the display device. In addition, the displayer also is configured to display a navigation tool for maneuvering the displayed naïve Bayes model data on the display device when the displayed naïve Bayes model data is too wide to display on the display device.