# CRM 고객데이터 분석 # R 프로그래밍 기초 복습 -- 2018.04.25 #--------------------- # vector 선언 c1 <- c(3,2,7,1) c2 <- c("seoul", "busan", "inchon", NA) c3 <- c(3,2,1,5) custlist <- data.frame(c1,c2,c3) custlist names(custlist) <- c("prchs","location","years") # variable names custlist str(custlist) names(custlist) head(custlist,2) nrow(custl..