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    plot(1:0.1:2,sin(1:0.1:2))
xlabel('x---')
ylabel('y--sin')
title('例子')
hold on
figure,
plot(0:0.1:2,cos(0:0.1:2))
figure(4)
subplot(2,2,1),plot(0:0.1:2,cos(0:0.1:2))
subplot(2,2,2),plot(0:0.1:2,sin(0:0.1:2))
subplot(2,2,3),plot(0:0.1:2,tan(0:0.1:2))
subplot(2,2,4),plot(0:0.1:2,cot(0:0.1:2))