get mean and std from sfit object
10 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Reto Hofmann
le 1 Avr 2014
Réponse apportée : Reto Hofmann
le 1 Avr 2014
I use poly55 for fitting a surface to my measurement data. The result is a sfit object from which I can extract the coefficients with coeffvalues(fitresults):
% Set up fittype and options.
ft = fittype( 'poly55' );
% Fit model to data.
[fitresult, gof] = fit( [xData, yData], zData, ft, 'Normalize', 'on' );
In the command Windowc comes:
Linear model Poly55:
fitresult(x,y) = p00 + p10*x + p01*y + p20*x^2 + p11*x*y + p02*y^2
+ p30*x^3 + p21*x^2*y + p12*x*y^2 + p03*y^3 + p40*x^4
+ p31*x^3*y + p22*x^2*y^2 + p13*x*y^3 + p04*y^4 + p50*x^5
+ p41*x^4*y + p32*x^3*y^2 + p23*x^2*y^3 + p14*x*y^4
+ p05*y^5
where x is normalized by mean 948.8 and std 307.3
and where y is normalized by mean 474.7 and std 226.8
Coefficients (with 95% confidence bounds):
p00 = 3.329 (3.271, 3.386)
p10 = -0.7384 (-0.8502, -0.6267)
p01 = -13.96 (-14.08, -13.83)
p20 = 1.843 (1.762, 1.923)
p11 = -0.1893 (-0.2839, -0.09466)
p02 = -0.2026 (-0.3119, -0.0933)
p30 = 0.1761 (0.07422, 0.2779)
p21 = 0.971 (0.8428, 1.099)
p12 = 0.0674 (-0.06616, 0.201)
p03 = 0.1113 (-0.03479, 0.2573)
p40 = -0.1148 (-0.1391, -0.09059)
p31 = 0.02515 (-0.00647, 0.05677)
p22 = 0.06291 (0.02904, 0.09678)
p13 = 0.002115 (-0.03754, 0.04177)
p04 = 0.03172 (-0.01116, 0.0746)
p50 = -0.02834 (-0.05165, -0.005038)
p41 = -0.05022 (-0.08373, -0.01672)
p32 = 0.0001545 (-0.03869, 0.03899)
p23 = -0.01278 (-0.04958, 0.02402)
p14 = -0.003341 (-0.04329, 0.03661)
p05 = 0.03711 (-0.005346, 0.07957)
How can I extract the mean and the std? This has to be saved somewhere in this sfit object.
0 commentaires
Réponse acceptée
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Linear and Nonlinear Regression dans Help Center et File Exchange
Produits
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!