how to fit a curve to 3 points automatically?
15 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Marry M
el 2 de Mzo. de 2016
Respondida: Torsten
el 3 de Mzo. de 2016
Guys, I'd like to find an automatic method for fitting y=-x^2 curve to three points x=[12 67 16]; can any one suggest me a matlab code please?
5 comentarios
Jos (10584)
el 2 de Mzo. de 2016
What are the parameters you want to estimate? Fitting a curve involves finding values for one or more unknown parameters, like finding A and B in the equation Yfit = A*x^2 + B that minimises the overal "distance" between the known values of y and the fitted values Yfit
Respuesta aceptada
Torsten
el 3 de Mzo. de 2016
Maybe something like
A=[x1^2 x1 1
x2^2 x2 1
x3^2 x3 1];
rhs=[y1 ; y2 ; y3];
sol=A\b;
func=@(x)sol(1)*x.^2+sol(2)*x+sol(3);
x=x1:0.1:x2;
y=func(x);
plot(x,y)
where (x1,y1), (x2,y2), (x3,y3) are the points in question ?
Best wishes
Torsten.
0 comentarios
Más respuestas (1)
Ver también
Categorías
Más información sobre Interpolation en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!