- #1
hunter55
- 3
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Homework Statement
For the given set of data, find the least-square curve:
A) f(x)=Ce^Ax, by using the change of variable X=x, Y=ln(y), and C=e^B to linearize the data points.
B) f(x) = 1/(Ax+B), by using the change of variable X=x and Y = 1/y to linearize the data points.
x : [ -1 0 1 2 3]
y : [ 6.62 3.94 2.17 1.35 0.89]
I need the MATLAB code on how to do these 2 problems I am confused and which curve gives a better fit. ??
Homework Equations
This is the only code i know but idk how to do it with the question they are asking i need to pertain it to that
function C = poly(X,Y,M)
n=length(X);
B=zeros(1:M+1);
F=zeros(n,M+1);
for k=1:M+1
F(:,k)=X'.^(k-1);
end
A=F'*F;
B=F'*Y';
C=A\B;
C=flipud(C);
The Attempt at a Solution
These are the coefficients:
-0.0458x^3
0.5225x^2
-2.1567x
3.9040
I am confused with what the question is asking i know I am suppose to have a ans for part A and B