使用ggplot2
我通常使用geom_text
和类似position=jitter
的内容来注释我的情节。
然而 - 对于一个不错的情节,我经常觉得值得手动注释。如下所示:
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,我无法获得文本注释颜色以匹配线条颜色。我想我可以通过手动缩放来解决这个问题,但我希望有更好的方法吗?
答案 0 :(得分:61)
我遇到了类似的问题,用JD Long回答解决了这个问题。但是,当ggplot2
更新到版本0.9.0的结果时,我注意到所有geom_text()
调用在图上呈现的模糊不清。
感谢kohske我发现了这段代码
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"))
绘制geom_text nrow(data2)
次!
向geom_text提供数据的正确方法是构建一个不同的data.frame,其中包含您要绘制的字符串的坐标,标签和颜色:
data2.labels <- data.frame(
time = c(7, 15),
value = c(.9, .6),
label = c("correct color", "another correct color!"),
type = c("NA*", "MVH")
)
ggplot(data2, aes(x=time, y=value, group=type, col=type))+
geom_line()+
geom_point()+
theme_bw() +
geom_text(data = data2.labels, aes(x = time, y = value, label = label))
答案 1 :(得分:47)
如果您使用geom_text()而不是annotate(),则可以将组颜色传递给您的绘图:
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: alt text http://www.cerebralmastication.com/wp-content/uploads/2010/03/before.png
然后在使用geom_text()后它看起来像这样: alt text http://www.cerebralmastication.com/wp-content/uploads/2010/03/after.png
答案 2 :(得分:0)
这些天来,有一些添加标签的软件包: