I started using Feedgnuplot a few weeks ago after getting tired of the complexities of plotting the data output from AWK and other CLI utilities. My options were preciously to install Matplotlib (including Python virtualenv) or GNUplot, remembering the exact commands to read a CSV format, plot and output to a window/PNG. Or needing a spreadsheet. Feedgnuplot makes all this a breeze. I'm a happy man now.