matlab怎么把大量数据绘制成一个二维图

clear all；
a=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25];
b=[68,92,88,81,83,84,76,53,53,66,85,78,58,94,94,93,63,91,94,56,61,86,69,92,68];
c=[73,69,76,73,79,67,76,96,97,93,95,66,86,84,81,66,74,79,95,67,80,96,90,85,85];
d=[85,74,76,84,95,86,68,65,76,80,81,99,72,70,80,91,90,83,64,91,79,79,65,82,65];
e=[88,65,70,98,83,56,64,95,87,90,81,90,63,78,66,74,63,85,96,97,70,85,65,66,84];
f=[86,83,80,94,98,66,86,94,94,73,69,71,81,86,92,97,92,94,95,56,69,75,76,68,87];
plot(a,b,'-*');hold on;grid;
plot(a,c,'-^r');
plot(a,d,'-sg');
plot(a,e,'-pb');
plot(a,f,'-dc');
xlabel('序号m');
ylabel('成绩');

x=1:5;
y1=[76,78 75 98 90];
y2=[56,19,70,57,98];
plot(x,y1,x,y2);
把这个放到matlab运行下,就明白了,把y1和y2换成甲老师\乙老师的个人数据就好了...

直接用imshow就可以，不过不清楚你的要求，
你最好详细说明你的要求和希望达到的目的