How can I plot a function with parametric if (change between parameters)

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chris v
chris v 2016-12-9
编辑： Mischa Kim 2016-12-10
I have the function :
t(r) = 39.64 if 0<r<r0 and
t(r) = 51.4875* exp( 0.14*(16.37-r)) if r0<r
where r in R(real numbers) and
r0 = 12.5
How I can get the plot/graph of function t(r) ...? Thanks! (Maybe the title question doesn't fit well in the meaning)

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Mischa Kim
Mischa Kim 2016-12-10
Chris, this should do the trick
r = 0:0.1:20;
r0 = 12.5;
t = 39.64*(r<=r0) + 51.4875*exp(0.14*(16.37 - r)).*(r>r0);
plot(r,t)

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