or download this
# Failed test at t/plot.t line 16.
# got: 'PDL::Graphics::Gnuplot: Your gnuplot has terminal 'un
+known' but it is not supported.
...
# Failed test ''Constructor created a plotting object' isa 'PDL::Gra
+phics::Gnuplot''
# at t/plot.t line 17.
# 'Constructor created a plotting object' isn't defined