Gnuplot 6.0.0

 I noticed that Gnuplot 6.0.0 is out.  Details of new features can be seen in the release notes.  I'm excited about the possibility of sector plots, in particular, it can make "polar equivalent to sparse-matrix heatmaps."  This is a kind of plot I do actually need to make for my research, and have outsourced the work to knowledgeable postdocs, or made somewhat ugly ones with matplotlib.  I'm keen to see what I can do with Gnuplot (while acknowledging that it is me, rather than matplotlib per se that stop me from making the plots I want to with mpl)