h=plot([0:0.1:2*pi],sin([0:0.1:2*pi]));grid on
set(h,'LineWidth',5,'color','red');
set(gca,'ytick',[-1 -0.5 0 0.5 1]);
set(gca,'yticklabel','a|b|c|d|e');
set(gca,'GridLineStyle','-','fontsize',20)