摘要:One install package install.packages("ggplot2") load library library(ggplot2) update.packages() vector v=c(1,4,4,3,2,2,3) get vector elements, index i 阅读全文
posted @ 2019-03-12 18:15 观海云不远 阅读(152) 评论(0) 推荐(0) 编辑