Attempting to get a line of best fit for a custom function

I am trying to get a line of best fit for a custom function. Here is my code and the plot that it produces. The problem is that the line seems to be touching every point, which is not what I want. Any suggestions? Also I understand that I can use the curve fitting app, but I prefer doing this by writing up a code

clc;
 x(1,:) = Y1;
 x(2,:) = Dmge;
 plot(x(1,:),x(2,:),'.');

 A= 5500; B=0.19; C=2.3;
 goemp_fit1 = @(y)sum((y(1)*exp(-exp(-y(2)*(x(1,:)-y(3))))-x(2,:)).^2);
 coeff = fminsearch(goemp_fit1,[A B C]);

 A = coeff(1);
 B = coeff(2);
 C = coeff(3);

x2 = x(1,:);
y2 = A*exp(-exp(-B*(x-C)));

plot(x2,y2,'-m')

[madhan ravi]

whats Y1 and Dmge?

Answer 1

[Walter Roberson]

x2 = x(1,:);

that is one row and multiple columns

y2 = A*exp(-exp(-B*(x-C)));

that involves all of x, so it involves two rows and multiple columns. Perhaps you should be using

y2 = A*exp(-exp(-B*(x2-C)));