循环遍历所有文件：＆＃34; missForest＆＃34;包装在R

Question

搜索问题的结果： 但是，我可能无法正确应用解决方案。

1. Which is the best method to apply a script repetitively to n .csv files in R?
2. Looping through all files in directory in R, applying multiple commands
3. Looping through all files in a directory in R

我的案例 我有一个包含数百个csv文件的文件夹。我需要运行＆＃34; missForest＆＃34;在R中打包以包含缺失值。 如果我逐个运行文件包，我必须执行以下操作：

##change the file name
G1344108 <- read.csv(file.choose(), header = TRUE)

##run missForest with default settings
G1344108.Forest <- missForest(G1344108, verbose = TRUE, maxiter = 5)

##save the imputed data matrix using filename$ximp 
write.csv(G1344108.Forest$ximp, file = 'G1344108_output.csv')

问题 如何循环浏览文件夹中的文件？

我以这种方式运行代码：

   all.files <- list.files()
   my.files <- grep(".*csv", all_files, value=T)
            for(i in my.files){
    # do your operations here
    G1344108.Forest <- missForest(G1344108, verbose = TRUE, maxiter = 5)
    # save
    output.filename <- gsub("(.*?).csv", "\\1.csv", i)
    write.table(G1344108.Forest$ximp, output.filename)
}

它重现了我以下错误：

Error in grep(".*csv", all_files, value = T) : 
  object 'all_files' not found
Error: object 'my.files' not found