📄 ch1_3.m
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% ch1_3.m
% Plot the diagram shown as Figure 1.2-3 on P.1-7
x=1:0.01:5; y=sin(x);
figure(1); plot(x,y); grid
title('Find minimum of y=sin(x) near x=3');
xlabel('x span. You can see the minimun(=-1) is near x=4.75');
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