Multiline graph in rails in pdf file

Hi all,
I want to give export option in my application that will export PDF file and it should consist multi-line graph. How can i do this in ruby on rails. I install prawn-graph. But I dont think it works for multiline chart. It works only for single line chart. What gem should i install to do this?

prawn will work , it also have some good document first read those :slight_smile: