1.1.2 `gnuplot'
---------------

gnuplot.gnuplot(S|proc=P)
     ::  Ask GNUPLOT to execute the command string S.

RETURN
     Void

P
     Number

S
     String

   *  The server executes the gnuplot command S.    When an error
     occurs,   the gnuplot itself terminates and ox_sm1_gnuplot server
     automatically   restarts gnuplot.

   *     gnuplot does not accept a long polynomial.

   *     gnuplot does not accept `^'. Use `**' instead.

     [232] P = gnuplot.start();
     0
     *Plot 3 dimensional graph.
     [233] gnuplot.gnuplot("splot x**2-y**2;"|proc=P);
     0
     *Plot 2 dimensional graph.
     [234] gnuplot.gnuplot("plot [-pi:pi] [-2:2] cos(x);");
     0
     *Output a graph as a postscript figure.
     [235] gnuplot.output(|file="hoge.eps");
     0
     [236] gnuplot.gnuplot("plot sin(x)*cos(x);");
     0
     [237] gnuplot.gnuplot(|file="x11");
     0

     *Plot 3 dimensional graph hiding unvisible lines.
     [236] gnuplot.gnuplot("set hidden3d");
     0
     [237] gnuplot.gnuplot("splot (x**2+y**2)*sin(x**2+y**2)");
     0
     [238] gnuplot.gnuplot("set isosamples 50");
     0
     [239] gnuplot.gnuplot("splot (x**2+y**2)*sin(x**2+y**2)");

Reference
     `ox_launch', `gnuplot.start', `rtostr',     `gnuplot.plot_dots'

Reference Book
     Yabuki Michiro, Otake Tuyoshi; Tukai konasu GNUPLOT, Techno Press,
        in Japansese,  ISBN4-924998-11-7

