Histograms of Categorical Data

Spine Chart

  • This chart type can be described as a univariate mosaic plot, or a histogram in which the height of all bars is the same, while their width is proportional to the number of observations of each level of a categorical variable.
  • The main purpose of a spine plot is to compare the proportions of highlighted observations between the different categories to explore for patterns.
Example Graph

A Spine Plot Showing the Proportions of the Selected Observations on an XY Scatter Chart Using the Same Data Source

Spine Chart