My problem is that I wanted to knit an .Rmd file with the setting dev = 'pdf', to get all the plots in pdf format. The problem is that my language is Hungarian so I would need "ő" charachter in the figure, which is missing.
As an example the legend title "egy főre eső" becomes "egy fore eso".
The problem do not emerge, when dev = "png" or anything else, but I need pdf.
Thank you for your help in advance.