Php generating speed graph

I have a number of data from mysql database to be populated into a graph format. The graph is speed vs time. The time will be in every minute. So far I have tried two tools one phPlot and Php开发者_运维问答GraphLib. The first one will only plot say at most 10 points and second one give me an error of too many points. Any help on how to draw a line graph with many x-axis points? Thank you.

here is a simple google chart wrapper in php, that i have used before

http://code.google.com/p/gchartphp/

there is a examples file with it that shows you the basics