Hi

I'm writing my PhD thesis (involving a lot of MR imaging), and would like to create figures with ggplot to display some basic principles of MR physics like the Bloch equations for T1 and T2. I've tried Googling but haven't come across what I (think) I'm looking for...

Is there a way to plot just a mathematical function without data points? E.g. SI = e^{-t/T2} where SI is signal intensity in a tissue, t is time in ms and T2 is T2 decay time in ms (time taken for 63% "signal loss", e.g. ~ 2500 ms for water and ~ 100 ms for white matter).

Please let me know if you need more context, and thank you for any help!