导入多个csv R时出错：没有此类文件或目录

Question

I'm trying to read multiple csv files and store them in 1 dataframe. What I did is:

 files <- list.files(path="the path/", pattern="*.csv")

 df = lapply(files, read.csv,sep = ";", encoding = "ISO-8859-1")

I've tried also sapply .

I'm getting:

Error in file(file, "rt") : cannot open the connection cannot open file 'onefile.csv': No such file or directory

Answer 1

data.table has a fast way to rbind a list of data frames (which is what the lapply returns), so using rbindlist :

library(data.table)
files <- list.files(path="the path/", pattern="*.csv", full.names = TRUE)
dt <- rbindlist(lapply(files, read.csv,sep = ";", encoding = "ISO-8859-1"),
  use.names = TRUE, fill = TRUE)

To use fread from data.table in the lapply :

dt <- rbindlist(lapply(files, fread, sep = ";", encoding = "Latin-1"),
  use.names = TRUE, fill = TRUE)

To do this in base R (without using rbindlist or fread from data.table ):

df <- do.call(rbind, lapply(files, read.csv, sep = ";", encoding = "ISO-8859-1"))