Question

求助：matlab怎么将4组数据画到一个坐标图中？？？

下面是我已经写好的将两组数据'file-1.txt'和'file-2.txt'组合在一起的代码，请教大神怎样将另外两组数据也添加进去，使得在同一坐标图中显示，即此坐标图中有四条线。数据中横纵坐标表示的意思一样。
c1=load(file-1.txt','-ascii');
c2=load('file-2.txt','-ascii');

h=figure(15);
set(h,'Position',[0,34,970,660]);
h=axes('FontSize',30);

plot(c1(:,1),c1(:,2),'-k','LineWidth',4);
hold on;
plot(c2(:,1),c2(:,2),'-r','LineWidth',4);

set(h,'FontName','Times New Roman','FontSize',30,'LineWidth',2,'Box','On');
xlabel('\its\rm/mm' ,'FontSize',30,'FontName','Times New Roman');
ylabel('\rm\alpha\rm/MPa','FontSize',30,'FontName','Times New Roman');
h=legend('5mm/min','10mm/min',1);
set(h,'EdgeColor','w');

Answer 1

...
c3=load(file-3.txt','-ascii');
c4=load('file-4.txt','-ascii');
hold on;
plot(c1(:,1),c1(:,2),'-k','LineWidth',4);

plot(c2(:,1),c2(:,2),'-k','LineWidth',4);

plot(c3(:,1),c3(:,2),'-k','LineWidth',4);

plot(c4(:,1),c4(:,2),'-k','LineWidth',4);

legend('c1','c2','c3','c4');
hold off;
...