1.设置对数坐标 set(gca,'XScale','log','YScale','log'); 2.加网格 grid on; 3.加log对齐网格 set(gca,'XScale','log','YScale','log',... 'XMinorGrid','on','XMinorTic','on',... 'YMinorGrid','on','YMinorTic','on'); 4.坐标轴名称 xlabel('false positives per image','FontSize',14)