Glossary

Frame

The aesthetics (usually x and y position) that help locate cases on a plot.

Glyph

The basic graphical unit that corresponds to a case in the data table.

Aesthetic

A perceptible property of a glyph that varies from case to case.

Scale

The relationship between the value of a variable and the graphical attribute to be displayed for that value.

Guide

An indication, for the human viewer, of the scale being used in an aesthetic mapping.