Wire the waveform to the Get waveform componants function...from that you get t0, delta t and the sample values. Now you can generate whatever string you want based on that information...
You could e.g. wire the Y array to a for-loop in which you calculate the time of each sample by taking t0 and adding delta t multiplied with the array index, then you could convert the Y value and the time to strings using the seconds to time string and number to fractional string functions...etc etc...