# add print warning argument using warning(warnings)
# update graphic examples with good comment, as in barplot
#is there any interest to be able to source elsewhere ? If yes, but may be interesting to put it into a new environement just above .GlobalEnv environment. See https://stackoverflow.com/questions/9002544/how-to-add-functions-in-an-existing-environment
# Make a first round check for each function
# Update all argument description, saying, character vector, etc.
