Possibilities of the graphical analysis of categorical data

The goal of my work was described the possibilities of the graphical analysis of categorical data. The first part is about clarifying the concept of categorical data and the rules of charting; the second part about the column and the pie chart, which are used most frequently. The last part presents graphical displays which often have variety properties and they are not used in normal commercial statistical programs. For example they allow a visual test of the hypothesis of independence. These are fourfold displays, sieve diagram, trilinear plot and mosaic display