with negative values you should set the range to -30 +xx or leave it empty it should work..
..
next version will have:
1. text color ( e.g. for white text on black background)
2. title on top of the plot.
works, in final test over night.
QUESTIONs:
What other functionality would be good? and is it easy to use to install i.e. the home-brew and gnuplot part. do we need to automate THAT
I would like to get some feedback on the read me (the manual is my weak point)
Karl