Errors in ggcraviola() function's help

[YoannPa]

Executing first part of the help returns:

Error in ggcraviola(data = df.minimal, lines.col = "black") : 
  Column 1 in data is not of type 'factor'.

[YoannPa]

The factor bug is now fixed ! The categorical variables can be store in a dataframe either as factors or as character, both are now supported.
gcraviola() will internally handle both case.
The help is working again, and has been enriched with additionnal information for customisation of ggcraviola()'s result.