using TyPlot
x = 0:(pi / 100):(2 * pi);
y1 = sin.(x);
y2 = sin.(x .- 0.25);
y3 = sin.(x .- 0.5);

figure();
plot(x, y1, x, y2, "--", x, y3, ":") #设置不同曲线的颜色

h=gca();
h.tick_params(top=true, labeltop=true,bottom=false, labelbottom=false); #规定横轴在上方
plt_set(h,["xgrid"],["on"])