gnuplot 形式

octave:26> t = linspace(0,10,11)'
t =

   0
   1
   2
   3
   4
   5
   6
   7
   8
   9
  10

octave:28> x = t .* t 
x =

    0
    1
    4
    9
   16
   25
   36
   49
   64
   81
  100

octave:29> gplot x

例
octave:3> x=(-2:0.5:2)'
x =

  -2.00000
  -1.50000
  -1.00000
  -0.50000
   0.00000
   0.50000
   1.00000
   1.50000
   2.00000

octave:4> data=[x, sin(x)]
data =

  -2.00000  -0.90930
  -1.50000  -0.99749
  -1.00000  -0.84147
  -0.50000  -0.47943
   0.00000   0.00000
   0.50000   0.47943
   1.00000   0.84147
   1.50000   0.99749
   2.00000   0.90930

octave:7> gplot data w l

octave:30> t = linspace(0,10,1000)';
octave:31> x = [t, sin(t), cos(t)];
octave:32> gplot x
octave:33> gplot x using 1:3
octave:34> gplot x using 2:3
octave:35> gplot x, x using 1:3