在折线图中绘制数据标签

I've got a data set as

我有一个数据集

prices<- c(100,101,102,103,104,105,108,107,106,105,104,100,98,97,94,90,88,89,89,90,91,90,92,90,94,95,90,89,84,89,80,91,94,94,95,98,103,110,112,70,65)
date<- Sys.Date() -41:1
data<- xts(prices,date)
lineChart(data)
prices<- c(1