Hey guys, I hope this is a quick one.

I've built an Arduino based datalogger and I have it configured to record a measurement every 30 seconds.
While that interval is easy to change from one test to the next, i'd like to know how I can limit the number of rows used to generate the chart to every other, or every third row. (without deleting the data)
some of these tests run for days so being able to display the data at 1min, 10min, or any other interval would be really helpful.

thanks for your time!