In ggplot2, the term mapping refers to the connection between variables and a plotting object like point, line, or other shape.
A geom in the gg plot2 system has "a plotting object like point, line, or other shape."A Geom is used in formulating different layouts, shapes, or forms of a ggplot2 such as bar charts, scatterplots, and line diagrams.
For example some different types of Geom can be represented as geom_bar(), geom_point(), geom_line() etc in ggplot2, the term mapping refers to the connection between variables and a Geom is used in formulating different layouts, shapes, or forms of a ggplot2 such as bar charts, scatterplots, and line diagrams.
Therefore, In ggplot2, the term mapping refers to the connection between variables and a plotting object like point, line, or other shape.
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