在格子条形图中添加线条和标签[R]

关于在格子中定制条形图，我有两个问题 . 我试图在条形图上添加标签分别编辑比例，但我的代码不起作用 . 我做错了什么？应该有一些值，包括“％” .

第二个问题是如何在条形后面的绘图区域的顶部和底部之间绘制线条，并且位于打印的刻度值 . 谢谢你的任何建议和帮助，塞巴斯蒂安 .

这是代码：

library(lattice)
library(plyr)
data(postdoc, package="latticeExtra")
colnames(postdoc) <- c("Legendtext 1", "2", "3", "4", "5")
colors <- c(rgb(166,27,30,maxColorValue = 255),                             
        rgb(192,80,77,maxColorValue = 255),
        rgb(24,65,83,maxColorValue = 255),
        rgb(60,143,167,maxColorValue = 255),
        rgb(130,184,208,maxColorValue = 255))
colorset <- simpleTheme(col=colors,                                          
                    border="white")
data.p <- prop.table(postdoc, margin=1)
data <- data.p * 100
pl <- barchart(data,
           par.settings = colorset,                                      
           box.ratio = 1,                                                
           xlab = " ",                                                   
           panel = function(...) {   # Code for panel function by rcs (http://stackoverflow.com/questions/3220702/display-values-in-stacked-lattice-barchart-r) - thank you very much!
             panel.barchart(...) 
             tmp <- list(...)
             tmp <- data.frame(x=tmp$x, y=tmp$y)
             # calculate positions of text labels                        
             df <- ddply(tmp, .(y),
                         function(x) {
                           data.frame(x, pos=cumsum(x$x)-x$x/2)
                         })
             panel.text(x=df$pos, y=df$y,                                
                        label=sprintf("%.0f", df$x),                     
                        cex=0.7, col="white")
             panel.axis(side = c("bottom"),
                        at = list(0, 20, 50, 75, 100),
                        labels = list("0%", "25%", "50%", "75%", "100%"),
                        ticks = TRUE)       
           },
           auto.key=list(columns=5, space="bottom",                          
                         cex=0.8, size=1.4, adj=1,
                         between=0.2, between.colums=0.1, 
                         size = 1.3, points = FALSE, rectangles = TRUE))