CODEWITHSUNDEEP
matlabcurve-fittingspline
user3646105
user3646105

Reputation: 2539

Getting y values back from spline fit

I used the MATLAB curve fitting tool to do a spline smoothing fit and created a function from it. How can I access the Y fit values so I can output them to a file? Seems I am only seeing the x values, and all of the coefs from fitresult. Here is the matlab code. Thanks!

function [fitresult, gof] = createFit(Freq, AmplNew)
%CREATEFIT(FREQ,AMPLNEW)
%  Create a fit.
%
%  Data for 'untitled fit 1' fit:
%      X Input : Freq
%      Y Output: AmplNew
%  Output:
%      fitresult : a fit object representing the fit.
%      gof : structure with goodness-of fit info.
%

%% Fit: 'untitled fit 1'.
[xData, yData] = prepareCurveData( Freq, AmplNew );

% Set up fittype and options.
ft = fittype( 'smoothingspline' );
opts = fitoptions( 'Method', 'SmoothingSpline' );
opts.SmoothingParam = 0.998;

% Fit model to data.
[fitresult, gof] = fit( xData, yData, ft, opts );

Upvotes: 3

Views: 761

Answers (1)

Robert Seifert
Robert Seifert

Reputation: 25232

Simply use feval:

y = feval(fitresult,x);

or just use 

y = fitresult(x);

Upvotes: 1

Related Questions