在 R 中读取多个文件后，如何使用循环 function 重命名多个文件的名称？

Question

I have multiple files under the folder of "rawdata", after read them and assigned them as seperated dataset, i also want to rename them from "dataset 1 a.csv" to "dataset1".

I wrote the code that achieve the first goal,using the first loop read all files as a list, then use the second loop to unset the list: ldf. But I don't know where I should add the code to let R change all file's name at once? I tried to add str_replace_all (names(ldf)," ", "-") at different places, but all returned wrong outputs, and it cannot solve the issue of getting rid of ".csv". Thanks a lot~~

Here is my code:

datanames<-list.files(here("rawdata"))

ldf<-list()

for (i in (datanames)){
  ldf[[i]]<-import(here("rawdata",i))
    for (j in names(ldf)){
      assign(j,ldf[[j]], .GlobalEnv)
    }
}

Answer 1

I'm not sure the pattern of the name you want to replace, but if it is blank-number-blank-letter.csv, use gsub to remove.

I'm not sure how you will import,but can use read.csv

Assign will assign the name.

lapply(1:length(list.files()), function(i) assign(gsub(" [0-9] [a-z].csv", "", list.files()[i]), read.csv(list.files()[i])))