set(gca,'XTick',1:1:length(x)); set(gca,'XTickLabel',{'15','20','25','30','35','40','45','50','55','60','65','70','75','80','85','90'... ,'95','100','105','110','115','120','125','130','135','140','145','150'..., '155','160','165','170','175','180','