在ggplot中编辑图例标签 [英] Editing legend labels in ggplot

问题描述

  data 
中值最小值最大值no_of_threads 
 2.33 2.10 6.85 1 
 2.43 2.14 3.41 2 
 2.39 2.13 7.90 3 
 2.74 2.10 8.30 4 
 2.53 2.21 6.69 5 
   
 $ b 
我做了这个R函数，绘制数据$ min和data $ max作为范围，数据$ median作为行：
 
 
  scalability_graph < - 函数（data）{
h < -  ggplot（data）
h <-h + 
 geom_ribbon （x = no_of_threads，y = median，color =＃CC873D））+ 
 scale_x_continuous（线程数 ，lim = c（0,20））+ 
 scale_y_continuous（Response time，lim = c（0,13））+ 
 opts（legend.position = c（0.20,0.90））
 
 
 
 
 
 
脚本产生这样的情节：
 
 
 
解决方案
您可以通过添加以下代码来完成此操作： 
 
 
  + scale_colour_manual（range，labels =median，values =＃CC873D，breaks =＃CC873D）
  
  
 
 
 
但你的情节和传说应该是这样吗？  
 
 
  h < -  ggplot（data，aes（no_of_threads，median））+ 
 geom_ribbon（aes（ymin = min，ymax = max，fill = factor（1）））+ 
 geom_line（aes（color = factor（1）））+ 
 scale_x_continuous（Number of threads 20））+ 
 scale_y_continuous（Response time，lim = c（0,13））+ 
 scale_fill_manual（breaks = 1，values =grey20，labels =range）+ 
 scale_colour_manual（breaks = 1，values =＃CC873D，labels =median）+ 
 opts（legend.position = c（0.20,0.85），legend.title = theme_blank（），legend.background = theme_blank（））
  
  
 
I have a dataframe that looks like this:
data
    median  min max no_of_threads
    2.33    2.10    6.85    1
    2.43    2.14    3.41    2
    2.39    2.13    7.90    3
    2.74    2.10    8.30    4
    2.53    2.21    6.69    5
I made this R function, that plots data$min and data$max as range, and data$median as line:
scalability_graph <- function(data){ 
  h <- ggplot(data)
  h <- h + 
      geom_ribbon(aes(x = no_of_threads, ymin = min, ymax = max)) +
      geom_line(aes(x = no_of_threads, y=median, color="#CC873D")) +
      scale_x_continuous("Number of threads", lim=c(0,20)) +
      scale_y_continuous("Response time", lim=c(0,13)) +
      opts(legend.position=c(0.20,0.90))
}
The script produces this plot:



How to change labels in legend and put "range" instead of top bold string, and "median" instead of bottom label? 
解决方案
you can do that by adding this one:
 + scale_colour_manual("range", labels = "median", values = "#CC873D", breaks = "#CC873D") 


but your plot and legend should be like this? 
h <- ggplot(data, aes(no_of_threads, median)) +
  geom_ribbon(aes(ymin = min, ymax = max, fill = factor(1))) +
  geom_line(aes(color=factor(1))) +
  scale_x_continuous("Number of threads", lim=c(0,20)) +
  scale_y_continuous("Response time", lim=c(0,13)) +
  scale_fill_manual(breaks = 1, values = "grey20", labels = "range") + 
  scale_colour_manual(breaks = 1, values = "#CC873D", labels = "median") +
  opts(legend.position=c(0.20,0.85), legend.title = theme_blank(), legend.background = theme_blank())


                        
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