Printing a variable inside a while loop

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Natalia Oñate Gomez
编辑： Ameer Hamza 2020-4-30
I'm trying to print rt, which is the time when the voltage reaches 27.4643, but it won't print anything. I think there's a problem inside the while or there's something wrong with the if. Basically, how can I make it print rt?
t=[0:0.5:100];
while (Vr>Vf)
V=Vo*exp(-t/(R*C));
I=Io*exp(-t./(R*C));
Q=Qo*exp(-t./(R*C));
U=Uo*exp(-2*t./(R*C));
Vr=V;
if(V==27.4643)
rt=-R*C*(log(V/Vo)); %ecuación diferencial despejada para obtener tiempo
disp(rt)
end
end

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回答（1 个）

Ameer Hamza
Ameer Hamza 2020-4-29
编辑：Ameer Hamza 2020-4-30
The value will probably never become exactly equal to 27.4643. You need to define some tolerance limits for this comparison.
if(abs(V-27.4643)<0.5)
If the value of V is within 0.5 of 27.4643, the condition will become true. Adjust the tolerance values according to your requirement.

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