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chap04-Rplots05-ggplot2.md
与 base 绘图系统不同, ggplot2 基于 Leland Wilkinson 在 《Grammar of Graphics》中所提出的图形语法范式, 形成了自己独特的语法系统与绘图思路, 通过不同图形组件的组合和图层的叠加, 生成最终图形. 在 ggplot2 中, 通常包括如下几个图形组件: ...
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