disp(['训练集公司总数:'num2str(90)]...
['信誉评级:A:'num2str(count_A)]... ['信誉评级:B:'num2str(count_B)]... ['信誉评级:C:'num2str(count_C)]... ['信誉评级:D:'num2str(count_D)]);
你把它们写在一行,中间加上逗号试试看