Web Reference: ggplot2 is a system for declaratively creating graphics, based on The Grammar of Graphics. You provide the data, tell ggplot2 how to map variables to aesthetics, what graphical primitives to use, and it takes care of the details. A system for 'declaratively' creating graphics, based on "The Grammar of Graphics". You provide the data, tell 'ggplot2' how to map variables to aesthetics, what graphical primitives to use, and it takes care of the details. 有很多很多不同的几何图形 (称为geoms，因为每个函数通常都以geom_开头)，默认情况下可以添加到ggplot中，扩展包甚至提供更多的几何图形。 让我们告诉ggplot2我们想使用哪种图形，例如通过添加geom_point ()来创建散点图:
YouTube Excerpt: Federica Gazzelloni presents
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Ggplot2 Book Club Chapter 9 Color Trends 2026: Meanings, Combinations, And Trends Explained Color & Biography
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