How do I calculate the coefficients C in this function while P and T are given?

T=[4:4:24]';
P=[1e-4;2.5e-4;6e-4;1e-3;1.6e-3;2.25e-3];
plot(T,P)
%find C with the given vectors

Answer 1

[Rafael Hernandez-Walls]

You can use this equations:

T=[4:4:24]';
P=[1e-4;2.5e-4;6e-4;1e-3;1.6e-3;2.25e-3];
plot(T,P,'o')
n=length(P);
A=[ones(n,1) T T.^2];
C=inv(A'*A)*A'*P;
P2=C(1)+C(2)*T+C(3)*T.^2;
hold on
plot(T,P2)