如何很好地注释 ggplot2(手册) [英] How to nicely annotate a ggplot2 (manual)

问题描述

使用 ggplot2 我通常使用 geom_text 和类似 position=jitter 的东西来注释我的图.

Using ggplot2 I normally use geom_text and something like position=jitter to annotate my plots.

然而 - 对于一个漂亮的情节，我经常发现手动注释是值得的.如下图:

However - for a nice plot I often finds it worthwhile to annotate manually. like below:

data2 <- structure(list(type = structure(c(5L, 1L, 2L, 4L, 3L, 5L, 1L, 
2L, 4L, 3L, 5L, 1L, 2L, 4L, 3L, 5L, 1L, 2L, 4L, 3L), .Label = c("EDS", 
"KIU", "LAK", "MVH", "NA*"), class = "factor"), value = c(0.9, 
0.01, 0.01, 0.09, 0, 0.8, 0.05, 0, 0.15, 0, 0.41, 0.04, 0.03, 
0.52, 0, 0.23, 0.11, 0.02, 0.64, 0.01), time = c(3L, 3L, 3L, 
3L, 3L, 6L, 6L, 6L, 6L, 6L, 15L, 15L, 15L, 15L, 15L, 27L, 27L, 
27L, 27L, 27L), year = c(2008L, 2008L, 2008L, 2008L, 2008L, 2007L, 
2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 
2006L, 2006L, 2006L, 2006L, 2006L)), .Names = c("type", "value", 
"time", "year"), row.names = c(1L, 3L, 4L, 5L, 6L, 7L, 9L, 10L, 
11L, 12L, 13L, 15L, 16L, 17L, 18L, 19L, 21L, 22L, 23L, 24L), class = "data.frame")
ggplot(data2, aes(x=time, y=value, group=type, col=type))+
geom_line()+
geom_point()+
theme_bw()+
annotate("text", x=6, y=0.9, label="this is a wrong color")+
annotate("text", x=15, y=0.6, label="this is a second annotation with a wrong color")

问题是，我无法使文本注释颜色与线条颜色相匹配.我想我可以用手动秤解决这个问题，但我希望有更好的方法吗?

The problem is, that I can't get the text annotations color to match the line color. I assume I could fix this with a manual scale, but I hope there is a better way?

推荐答案

如果您使用 geom_text() 而不是 annotate() 您可以将组颜色传递给您的绘图:

If you use geom_text() instead of annotate() you can pass a group color to your plot:

ggplot(data2, aes(x=time, y=value, group=type, col=type))+
geom_line()+
geom_point()+
theme_bw() +
geom_text(aes(7, .9, label="correct color", color="NA*")) +
geom_text(aes(15, .6, label="another correct color!", color="MVH")) 

所以使用 annotate() 看起来像这样:替代文字 http://www.cerebralmastication.com/wp-content/uploads/2010/03/before.png

So using annotate() it looks like this: alt text http://www.cerebralmastication.com/wp-content/uploads/2010/03/before.png

然后在使用 geom_text() 之后它看起来像这样:替代文字 http://www.cerebralmastication.com/wp-content/uploads/2010/03/after.png

then after using geom_text() it looks like this: alt text http://www.cerebralmastication.com/wp-content/uploads/2010/03/after.png

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