I am using a data-logging system that adds a value to a data file called today.dat every 2 minutes.
Here is what the data looks like:
Here is the gnuplot program I use, where X is time and Y is voltage. It also draws some lines showing constant critical values:
You'll notice that I use the following two commands after the plot command:
pause 30 reread
This makes the plot live and shows me voltage readings on the battery bank for my solar power station as they come in.
The plot works great. It automatically updates so the display is near-real-time.
Here is an example:
SO MY QUESTION IS:
Is there a way to have a text box on-screen showing just the latest voltage reading as the chart updates?