1. A method for displaying category data, where a data set comprises at least one category comprising a category data set, said method comprising: calculating a distribution of values of a continuous attribute in said category data set in one of said at least one category; displaying said distribution as a rhombus and a rectangle, where an edge of said rectangle corresponds to a range of values for said continuous attribute, where said rhombus is positioned on said rectangle, and where the position and shape of said rhombus corresponds to said distribution.