剪辑线条以绘制区域并在绘图区域外显示文本 [英] Clip lines to plot area and display text outside plot area

问题描述

我想限制我的情节的可见y范围。为了保留超出此范围的值，我需要将 oob （ out of bounds ）设置为 rescale_none code>，这个效果很好。

但是我还想在图的边缘添加一些文字。为了做到这一点，我需要关闭裁剪。这有一个效果，那就是界限外的值被绘制在边界外的绘图区域之外。

是否有利用边距绘制文本和剪辑值来绘制区域？

 ＃Data 
 set.seed （1）
 df < -  data.frame（x = 1：100，y = rnorm（100，mean = 1，sd = 1））
＃基本图
 
库（ggplot2）
库（比例）
库（网格）
 
g<  -  ggplot（df）+ 
 geom_line（aes（x，y）） 
 
 
＃超出比例限制的值将被丢弃
 g1 < -  g + scale_y_continuous（limits = c（0,2））
  

p>

 ＃这就是我想要的
 g2 < -  g + scale_y_continuous（limits = c（0,2），oob = rescale_none）
  

 ＃...但是，我想要p批量绘图区域以外的一些文本
＃并且需要关闭裁剪才能显示文本... 
 g3 < -  g + scale_y_continuous（limits = c（0,2），oob = （aes（label =Nonsense，y = Inf，x = 0），hjust = 0，vjust = -1）+ $ b（$ s 
 $＃ $ b＃为文本添加一些空间
 theme（plot.margin = unit（c（2,1,1,1），lines））
 
＃关闭剪辑geom_line也出去绘图区域... 
＃请参阅这里剪辑... http://stackoverflow.com/a/12417481/1478381 
 g4 < -  ggplot_gtable（ggplot_build（g3））
 g4 $ layout $ clip [g4 $ layout $ name ==panel]<  - off
 
 grid.draw（g4）
  

解决方案

使用
pre $ g $ g $ ggplotGrob（g2 ）
gg < - gtable_add_grob（gg，textGrob（Nonsense，x = 0，hjust = 0），t = 1，l = 4）
grid.draw（gg）


I want to restrict the visible y-range of my plot. In order to retain values that fall outside this range I need to set oob (out of bounds) to rescale_none and this works well.

However I would also like to add some text in the margins outside the plot. In order to do this I need to turn off clipping. This has the effect that values that are out-of-bounds are plotted outside the plot area in the margins.

Is there anyway to plot text in margins and clip values to plot region?

#  Data
set.seed(1)
df <- data.frame( x=1:100,y=rnorm(100,mean=1,sd=1) )
# Basic plot

library(ggplot2)
library(scales)
library(grid)

g <- ggplot(df)+
geom_line(aes(x,y))


#  Values exceeding scale limits are dropped
g1 <- g + scale_y_continuous( limits = c(0,2) )

#  This is what I want
g2 <- g + scale_y_continuous( limits = c(0,2) , oob = rescale_none )

#  ...But, I would like to plot some text outside the plotting region
#  and need to turn off clipping to get the text to display...
g3 <- g + scale_y_continuous( limits = c(0,2) , oob = rescale_none ) +
    # Some text to sit above the plot
    geom_text( aes(label = "Nonsense", y = Inf, x = 0), hjust = 0, vjust = -1) +
    # Add some space for the text
    theme(plot.margin = unit(c(2,1,1,1), "lines")) 

#  Turning off clipping makes geom_line also go outside plot area...
#  See here for clipping... http://stackoverflow.com/a/12417481/1478381
g4 <- ggplot_gtable(ggplot_build(g3))
g4$layout$clip[g4$layout$name == "panel"] <- "off"

grid.draw(g4)

解决方案

With an approach from here, here's my solution:

library(gtable)
gg <- ggplotGrob(g2)
gg <- gtable_add_grob(gg, textGrob("Nonsense", x=0, hjust=0), t=1, l=4)
grid.draw(gg)

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