On Sunday,  1 Oct 2017 at 15:06, Peter Davis wrote:
> I do have those lines in my .org file, but no PDF was produced. I tried
> switching to png, but still no file was produced.

Check the *gnuplot* buffer to see if there were any gnuplot errors.

-- 
: Eric S Fraga via Emacs 27.0.50, Org release_9.1.1-78-gfbf47c