point(x,y); ?

Processing itself is meant to make data visualisation easier (and fun). In other words it does not provide predefined data plotting methods (graphs, bar charts) but simple to use graphics commands to do these and more yourself.

If you are looking for standard (scientific) graph plotting, you could try our plotting library gwoptics.

Andreas

there is a platting library called gw optics. http://www.gwoptics.org/processing/gwoptics_p5lib/
or just like bjordal says, use point(x,y) inside a for loop .

edit : some seconds to late :)

Thanks guys i guess the good thing about using the library is it can set up the axis and axis labels easily

I also was looking for a library or function for plotting so I was happy to hear in this forum about gw optics.
I'll take a closer look when I have time.
For me it is important to be able to take in data and plot it and have a reasonable looking graph. It is a big leg up to not have to figure out how to put on labled axis and titles...
I was surpised I could not find this with a simple google search. Lots of hits on MatLab but nothing useful on processing.