A mosaic plot, Marimekko chart, Mekko chart, or sometimes percent stacked bar plot, is a graphical visualization of data from two or more qualitative variables. It is the multidimensional extension of spineplots, which graphically display the same information for only one variable. Although the term spineplot was originally used by Hummel to describe univariate graphs, Cox points out that the term has also been broadly applied to displays of two or more variables.