R语言--初步学习

1、解决R语言xlsx安装遇到问题

https://blog.csdn.net/wqdwin/article/details/75386673

安装顺序要是install.packages("rJava")

install.packages("rJava")

install.packages("xlsxjars")

library ("xlsx")

2、读取excel表格数据

https://blog.csdn.net/qq_40875849/article/details/83052793

a = read.xlsx("C:\Users\admin\Desktop\2.xlsx",encoding = "UTF-8",1)

3、重命名某一列的名字

names(a)[3] = "结果"

4、向excel写入数据（保存）：

write.xlsx(a,"C:\Users\admin\Desktop\2.xlsx")

5、安装ggploat2

install.packages("colorspace")

install.packages("ggplot2")

library("ggplot2")