These lines of code help make a better looking plot that can be exported for a notebook or a publication.

• plot(x,y2,'LineWidth',1.8); %make curve thicker than default
• axis([3 35 0 34])
• set(gca,'linewidth',1.7) %make axis lines thicker than default
• xlabel('wavelength')
• ylabel('intensity')
• set(gca,'FontSize',26) %make text bigger than default