[R] 1/1~12/31까지 존재하는 파일들을 한번에 불러와서 합치기

R: 1/1~12/31까지 존재하는 파일들을 한번에 불러와서 합치기

 

 

 

library(rio)
 
monthDays <- c(31, 28, 31, 30, 31, 30, 31,31, 30, 31, 30, 31)
result <- data.frame()
 
for(i in 1:12){
  m <- ifelse(i<10, paste0("0",i), i)
  dataPath <- paste0("LOCAL_PEOPLE_2017", m)
 
  for(j in 1:monthDays[i]){
 
    j <- ifelse(j<10, paste0("0",j), j)
    dataPath2 <- paste0(dataPath, j, ".csv")
    data <- import(dataPath2)
 
    data <- data[, c(3,5)]
    colnames(data) <- c("location", "livingPeolple")
 
    data$location <- data$location %/% 1000
    split_data <- split(data, data$location)
 
    for(k in 1:length(split_data)){
      location <- names(split_data[k])
      peopleFlowSum <- sum(split_data[[k]]$livingPeolple)
 
      temp <- data.frame(location, peopleFlowSum)
 
      result <- rbind(result, temp)
    }
 
    print(paste0(dataPath2, " is done") )
 
 
  }
}