title: Combining huge data sets in R
body: <p>I am new to working with huge data sets in R. So I appreciate any help
  I have 20 years of data, and for each year three .csv files, each file size is about 3 GB
  I tried function list.files() to store the names of files in a vector
  and now I know theoretically I need to loop along this vector to read the files and generate integrals one by one  and also combine the files. But i don't know how I can loop along and combine my data sets or run different models!!!! Constantly i get error &quot;Error: cannot allocate vector of size 3.4 Gb&quot; or &quot;Memory is exhausted, reached the limit&quot;!!!!!!!
  I would be thankful if anybody could guide me.
  Best regards
  Sara</p>