R multi-file operation

Question

First I load table from the txt file and then I perform several transformations on the table:

directory <- 'path'

setwd(directory)


data <- read.table("sample.txt", header=TRUE)

data2 <- data[,c(1,2,3,5,7,8)]

data2$cb <- paste(data2$c,data2$b,sep = ".")

finaldata <- data2[,c(7,1,2,3,4,5,6)]

The problem is that I have about 100 of such txt files and I need to automate that process.

I start by listing files like this:

filenames <- list.files(path=getwd(),pattern = "*.txt")

But now I dont have any idea how it should work. Should i do it in for loop or is there any other way?

Im new in R and this is my first post, so I ask for your understanding.

Answer 1

for (i in 1:length(filenames)) {

  data <- read.table(filenames[i], header=TRUE)

  ...


}