5
任何人都可以告诉我如何使用gnuplot绘制复杂的指数。我试图用这个脚本来绘制它们,但是无法识别参数i
。Gnuplot和复杂的指数
set terminal epslatex color colortext size 9cm,5cm
set size 1.5,1.0
set output "eulerjeva_identiteta_1.tex"
set style line 1 linetype 1 linewidth 3 linecolor rgb "#FF0055"
set style line 2 linetype 2 linewidth 1 linecolor rgb "#FF0055"
set style line 3 linetype 1 linewidth 3 linecolor rgb "#2C397D"
set style line 4 linetype 2 linewidth 1 linecolor rgb "#2C397D"
set style line 5 linetype 1 linewidth 3 linecolor rgb "#793715"
set style line 6 linetype 2 linewidth 1 linecolor rgb "#793715"
set style line 7 linetype 1 linewidth 3 linecolor rgb "#b1b1b1"
set style line 8 linetype 3 linewidth 1 linecolor rgb "#b1b1b1"
set grid
set samples 7000
set key at graph .95, 0.4
set key samplen 2
set key spacing 0.8
f(x) = exp(i*x)
g(x) = exp(-i*x)
h(x) = exp(i*x)+exp(-i*x)
set xrange [-2*pi:2*pi]
set yrange [-1.2:1.2]
set xtics ("$0$" 0, "$\\pi$" pi, "$-\\pi$" -pi)
set ytics ("$1$" 1, "$-1$" -1)
set xlabel "$x$"
plot [-2*pi:2*pi] f(x) ls 1 title "$\\e^{ix}$", g(x) ls 3 title "$\\e^{-ix}$", h(x) ls 5 title "$\\e^{ix} + \\e^{-ix}$"
有没有办法欺骗?我的意思是画一些sin函数,而不是e^ix? – 71GA 2013-04-06 20:50:20
因为exp(i * x)= cos(x)+ i * sin(x),我认为这将是'plot imag(exp(i * x))'。 – andyras 2013-04-06 22:39:41
注意'exp(ix)= cos(x)+ i sin(x)'。 – Bernhard 2014-03-19 12:01:56