Graph 2

I was wondering if anyone is using this class.
I played with it a little and I like it a lot but have some questions.
I hoped to get some questions answered here.

Q: What is the difference between draw and draw_stack?

Q: You should be able to put more than one on a page... Has anyone tried?

THanks...

I get it... if you want to use the graph with HTML (two graphs on a page) then you use the file_name and create an image file.

That was really silly that I didn't 'see' it.

Would still like an answer to the difference between draw and draw_stack.

Thanks...