clc; clear; close all;x = 0:2:8;y = x.^2;plot(x,y);axis([0 8 -inf inf]);set(gca,'XTick', 0:8);set(gca,'XTickLabel',{'a=0', '', 'b=2', '', 'c=4', '', 'd=6', '', 'e=8'}, 'FontName','Arial', 'FontSize',20, 'XColor',[1 0 0]);