text: Q:
  
  how to add to a file, rather than overwrite using write.csv
  
  simple question - I am using the write.csv function in R:
  write.csv(t(y), file = "test.csv")
  
  Where y is a dataframe of a file in my directory
  However, I have many files in my directory, and I want the output of each file to be written to "test.csv" by using a loop. However, just testing this out I notice that if I write to test.csv, and then repeat the command with another file, instead of adding it overwrites test.csv instead of adding to it. 
  so my question is how to I add to test.csv rather than overwrite it.
  Thanks very much.
  
  A:
  
  write.csv(t(y), file = "test.csv", append=TRUE)
  
  should do it.
  
  