It's not exactly what you want, but you can do parametrized plots in TikZ to plot a given function for some range: http://www.texample.net/tikz/examples/paramet

It's not exactly what you want, but you can do parametrized plots in TikZ to plot a given function for some range: http://www.texample.net/tikz/examples/parameterized-plots/ http://www.texample.net/tikz/examples/parameterized-plots/. I wouldn't be surprised if someone wrote a tool that allows you to use a reference to an equation as the function to plot :).