read.table("1.csv", header=TRUE, sep=",", fileEncoding="UTF-8", stringsAsFactors=FALSE);
data2 <- read.csv...("2.txt", header=TRUE, sep=",");
#不带表头
data2 <- read.csv("2.txt", header=FALSE, sep=",", col.names=c...("age", "name"));
data3 <- read.csv("3.xxx", header=FALSE, sep=",");
#指定分隔符
data3 <- read.csv("3.xxx