Plotting actual measurement time with variable intervals

I have been playing around for a while trying to figure out how to plot (in real time) data taken at varying time intervals.  The attached is what I came up with, using the loop counter as my data for ease of analysis.  Essentially, I'm cheating by looping an array and creating a new plot every time.  It seems like overkill but trying to do a waveform chart doesn't seem possible with sampling rates !=1, and waveform graphs do not plot in real time.  Is there a better way to do this?

Thanks!