Find a a value from a graph that is not in the array using reciprocal fit

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Pipe
Pipe le 28 Août 2022
Réponse apportée : Torsten le 28 Août 2022
This is my code. So I plotted t1 and n and now I need to find the reciprocal and with the reciprocal find the t1 value of n=0.653. But at the end I am just getting an empty array.
t1= [6.22 3.59 2.68 2.53 2.19 1.82];
n= linspace(0.60,0.70,6);
plot(n,t1,"g")
hold on
p= polyfit(n,t1,1);
f1= polyval(1./p,n);
plot(n,f1)
index = find(n==0.653);
f1_point= f1(index);

Réponse acceptée

Torsten
Torsten le 28 Août 2022
t1= [6.22 3.59 2.68 2.53 2.19 1.82];
n= linspace(0.60,0.70,6);
f1 = interp1(n,1./t1,0.653)
f1 = 0.3875

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