Hi and thank you for your work on the coder package. I ran into issues while applying the categorize function to a fairly large dataframe (~4GB). The function returns the following error message:

Error in copybig(x, .copy) : 
  Object is > 1 GB. Set argument 'copy' to TRUE' or FALSE to declare wether it should be copied or changed by reference!

But there seems to be no way (judging from the documentation) to actually set the copy argument. I've tried including either copy = TRUE or .copy = TRUE to my calls to categorize(), in both cases without effects. Is there another way to address the issue?