The files contain over 8600 lines of data.

8640 data points (I'm assuming that you are pinging once every 10 seconds over each 24 hr period?), is not a lot of data. There really is no need to do you own thing. I just generated a 8640 timestamps/random times and plotted them on a 1024x768 points graph, and the total memory usage was well under 10 MB for the program, data and graph.

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In reply to Re^3: Graph a file without using arrays by BrowserUk
in thread Graph a file without using arrays by ITmajor

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