Plotting a Line Graph

(sorry about the long Subject line typo - resending) I have a data file that stores about 500 numbers in a record - meant to plot a basic line graph (left to right). The numbers can be imported into a record with 500 fields or just stored in a text field - which ever is better. The user might want to pick a few random records and plot them together - so the line graph may compare the few records together. It seems that the google charts work from a url - so 500 points would be way to long for any url - so I guess that option is out. Q: what is the best way to create / display line graphs in with PHP? Thanks in advance for your help - dave Thanks, cool@hosting4days.com