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How to plot this function ?

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Wasp Hamberg
Wasp Hamberg 2018-10-31
评论： Wasp Hamberg 2018-10-31
U(t)={=-t,t=(0,pi/2); = 0, (pi/2,pi)}

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the cyclist
the cyclist 2018-10-31

Here is one way:

U = @(t) -(t<pi/2).*t + (t>=pi/2) * 0; % Don't really need that second term, since it is always zero

figure
tt = 0:0.01:pi;
plot(tt,U(tt),'.')

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