June 2020
Beginner to intermediate
522 pages
9h 6m
Chinese
Content preview from R 语言经典实例（原书第 2 版）
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图 10-61：使用
patchwork
绘制的四个图像
10.26 在文档中绘制图形
10.26.1 问题
你需要将图形保存在文件中，例如 PNG、JPEG 或 PostScript 文件。
10.26.2 解决方案
使用 ggplot 绘图，你可以使用 ggsave 将显示的图像保存到文件中。ggsave 会为你
做一些关于大小和文件类型的默认设置，允许你只指定一个文件名：
ggsave("filename.jpg")
文件类型由你传递给 ggsave 的文件名中使用的扩展名获得。你可以通过在 ggsave 中
设置参数来控制大小、文件类型和比例的详细信息。有关具体细节，请参阅 ?ggsave。
10.26.3 讨论
在 RStudio 中，一个快捷方式是在 Plots 窗口中单击 Export，然后单击“ Save as Image”
（另存为图像）、“Save as PDF”（另存为 PDF）或“ Copy to Clipboard”（复制到剪贴板）。
保存选项将提示你在保存文件之前输入文件类型和文件名。如果你手动将图形复制并粘
贴到演示文稿或文字处理器中，“ Copy ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.