[Gnuplot-info] Vector fields with pseudo-file '+'

[Peter D. <pc...@wi...>]

Has anyone plotted vector fields with the pseudo-file '+'? It would be
nice to avoid intermediate files.

It seems like '+'s one-variable limitation in plot would make that
impossible, though.

Intuitively, I want to do something like:

    plot '+' using ($1):($2):($2**2 - 2*$1*$2):(3*$1*$2 -  6*$1**2) \
    with vectors

to express the vector equation:

    F(x, y) = <y^2 - 2xy, 3xy - 6x^2>