error bar in curve fitted graph

Sir,

I am having two data x and y . After that I have fitted data using curve fitting tool (using polunomial of degree 1). Then I got plot with curve fitted graph. I want to get error in this graph as error bar. How to get?

Answer 1

[Sam Chak]

Use errorbar().

x   = (-1:0.1:1)';
y   = asinh(x/0.5);
f   = fit(x, y, 'poly1')

f = 
     Linear model Poly1:
     f(x) = p1*x + p2
     Coefficients (with 95% confidence bounds):
       p1 =       1.576  (1.514, 1.638)
       p2 =  -6.057e-18  (-0.03753, 0.03753)

err = y - f(x);
errorbar(x, y, err),  hold on
plot(x, f(x), '--.'), grid on
xlabel x, ylabel y
legend('data', 'fitted poly1', 'location', 'se')

[Debarati Ghosh]

@Sam Chakthank you sir

[Sam Chak]

Hi @Debarati Ghosh, If you find the solution helpful, please consider clicking 'Accept' ✔ on the answer to close the issue.