Simple 2D graphics on OSX

What's a simple way to do simple 2D graphics on OSX?

Simple, as in "10 HGR2: HPLOT ...", not 'simple' as in 600-line framework wrappers &| D0InG 1T tH3 CyB3RsPaC3 W@Y dRaGgInG 3D gUi W1Dg3tS aR0U|\|D iN @N INt3rFaC3 BuIlD3R.

Suggestions using the supplied interpreted languages are fine (Perl, Python, etc.)

>>1
I don't really know but the difficult approach would be to subclass some view in Objective-C and write your own parser with something like Lex/Yacc... I wouldn't do this unless I had to integrate it in a real program.

You can install gnuplot instead (very easy to use) and learn how to use it to generate pictures from your functions. This or the Perl/Python approach is of course independant on the system you are using, but I guess the Perl/Python way would require the use of a wrapper, it would not be immediate if you are using raw data or mathematical functions. I'd rather go with gnuplot (or Mathlab or Maple if you have these at home).