How could I put FIT parameters' errors in a variable?

Hi, i know that I could do:

fuz=fittype('(a*x)/(1+b*(x^2))');

d=fit((final(:,8)),(final(:,6)),fuz,'StartPoint',[r1,s1]);

coeffi=coeffnames(fuz);

coefvv=coeffvalues(d);
g=coefvv'

and in g(1) there's the value of a and in g(2) the value of b.

But if I do:

fuz=fittype('(a*x)/(1+b*(x^2))');

[val1,val2,val3]=fit((final(:,8)),(final(:,6)),fuz,'StartPoint',[r1,s1]);

disp(val1);

I have also the error bars on the parameters...How could I put them into variables?

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

Answer 1

[Gabriele]

if I do disp(val1) I display in the command window:

General model:
     val1(x) = (a*x)/(1+b*(x^2))
     Coefficients (with 95% confidence bounds):
       a =   0.0002983  (-0.0002809, 0.0008774)
       b =   1.93e-009  (-3.784e-008, 4.17e-008)

how can I put the two numbers in (-3,784e-008, 4.17e-008) in a variable?

Answer 2

[Gabriele]

the solution is reported here http://www.mathworks.it/it/help/curvefit/confint.html I hope it would be useful for anyone in the future...

[Elise C]

I'm in the future and I say thank you.