to read .csv files in R : <p>I need some help. I'm begginer on R and I don't know how to read .csv files from different folders. I only know how to read  files from one folder. One folder is with new data .csv and other with old data .csv and i have to read them in two massives. (Note: there are many files in both folders). Later I will have to compare new vs old files. Could you help me to write a code for that? or just tell some advices. Thank u.</p>
