在不同的方面手動標註具有不同標籤的ggplot

Question

JD Long幫助我：question about manual annotation。

但是有可能在一個多面的情節上做類似的事情，例如標籤樣式對應於linestyle（aestetics），並且可以單獨註釋不同的方面？

一些數據：

funny <- structure(list(Institution = structure(c(1L, 1L, 1L, 1L, 2L, 
2L, 2L, 2L, 3L, 3L, 3L, 3L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 3L, 
3L, 3L, 3L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 3L, 1L, 
1L, 1L, 1L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 3L), .Label = c("Q-branch", 
"Some-Ville", "Spectre"), class = "factor"), Type = structure(c(5L, 
6L, 1L, 3L, 5L, 6L, 2L, 4L, 5L, 6L, 2L, 4L, 5L, 6L, 2L, 4L, 5L, 
6L, 2L, 4L, 5L, 6L, 2L, 4L, 5L, 6L, 2L, 4L, 5L, 6L, 2L, 4L, 5L, 
6L, 2L, 4L, 5L, 6L, 2L, 4L, 5L, 6L, 2L, 4L, 5L, 6L, 2L, 4L), .Label = c("Korte videregående uddannelser", 
"Mammas beer", "Mellemlange videregående uddannelser", "Tastes good", 
"Unknown", "Your"), class = "factor"), År = c(2008L, 2008L, 
2008L, 2008L, 2008L, 2008L, 2008L, 2008L, 2008L, 2008L, 2008L, 
2008L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 
2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 
2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2007L, 2006L, 2006L, 
2006L, 2006L, 2006L, 2006L, 2006L, 2006L, 2006L, 2006L, 2006L, 
2006L), Mndr = c(3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 
3L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 15L, 15L, 
15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 27L, 27L, 27L, 
27L, 27L, 27L, 27L, 27L, 27L, 27L, 27L, 27L), Data = c(159L, 
NA, NA, 23L, 204L, NA, NA, 12L, 256L, NA, NA, 24L, 166L, 6L, 
NA, 43L, 228L, NA, NA, 20L, 196L, 11L, NA, 37L, 99L, 14L, 9L, 
96L, 147L, 7L, 5L, 91L, 100L, 10L, 7L, 126L, 60L, 17L, 6L, 106L, 
78L, 18L, 13L, 140L, 48L, 23L, 5L, 136L)), .Names = c("Institution", 
"Type", "År", "Mndr", "Data"), class = "data.frame", row.names = c(NA, 
-48L)) 

而且琢面情節：

ggplot(funny, aes(Mndr, y=Data, group=Type, col=Type)) + 
    geom_line() + 
    facet_grid(.~Institution) 

預先感謝您的幫助！

Answer 1

想法是，對於每個手動註釋，您不僅要定義標籤，還要定義面板，顏色等的所有變量。以下代碼在不同面板中添加了兩個標籤。

pl <- ggplot(funny, aes(Mndr, y=Data, group=Type, col=Type))+geom_line() 
     +facet_grid(.~Institution) #your plot 
nd <- data.frame(Institution=c("Q-branch","Some-Ville"), #panel 
       Type=c("Unknown", "Tastes good"),  #color 
       Mndr=c(7,12),       #x-coordinate of label 
       Data= c(170,50),       #y-coordinate of label 
       Text=c("Label 1", "Label 2"))   #label text 
# add labels to plot: 
pl <- pl + geom_text(aes(label=Text), data=nd, hjust=0, legend=FALSE) 
pl 

legend=FALSE選項將確保表示文本的小a未添加到圖例中。您不必爲標籤設置數據框，您可以爲每個標籤單獨設置geom_text，但我覺得這種方式更簡單。