[Haskell-cafe] Plotting Vectors with GnuPlot Wrapper

Hi When I use Vectors as a PlotStyle in Graphics.Gnuplot.Simple, the output curve.gp and curve0.csv is not generated correctly. For example when I write in ghci: plotPathStyle [] (PlotStyle Vectors (DefaultStyle 1)) [(1,1),(2,7)] the output files are: curve.gp: plot "curve0.csv" using 1:2 with vectors linestyle 1 curve0.csv: 1, 1 2, 7 But they must be: curve.gp: plot "curve0.csv" using 1:2:3:4 with vectors linestyle 1 curve0.csv: 1, 1, 2, 7 Is there any option that should I use to correct this behavior? Regards Mary