# Deprecation in R

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After my recent article on marking deprecated code in Python, I had to do the same thing in R. It’s included in the language (in The R Base Package).

To deprecate an object simply make a call to the .Deprecated() function. It will produce a warning—that can be suppressed by users by calling suppressWarnings().

It’s also possible to signal that an object has been removed through a call to .Defunct(). In this case it will produce an error, in other terms the program will stop working.

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16  old_function <- function() { .Deprecated(msg = "Will be removed in the next version") cat("\nI'm old now I want to retire...") } dead_function <- function() { .Defunct(msg = "Function removed :-(") cat("\nI'm dead now I will not chat anymore...") } old_function() # Will be removed in the next version # I'm old now I want to retire... dead_function() # Error : Function removed :-(