how do I store and use fitobjects

Question

Allen 2017-1-20

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https://ww2.mathworks.cn/matlabcentral/answers/321307-how-do-i-store-and-use-fitobjects

回答： Sindhuja Parimalarangan 2017-1-23

在 MATLAB Online 中打开

For reasons I won't go into I need to store a series of curve fits and plot them all at once.

I calculate a fit to a set of points as follows:

f{i} = fit(x,y,fitModel,fitOptions)

and then plot it using

plot(f{k}, cmap(k,:));

but I get the message

Error using cfit/plot>parseinput (line 328)
Must specify both XDATA and YDATA.
Error in cfit/plot (line 42)
[S1,xdata,ydata,S2,outliers,S3,ptypes,conflev] =
parseinput(alltypes,varargin);

If I look at f{i} , e.g. f{1}:

>> f{1}
ans = 
     Linear model Poly1:
     ans(x) = p1*x + p2
     Coefficients (with 95% confidence bounds):
       p1 =       92.11  (60.03, 124.2)
       p2 =       3.611  (-1.991, 9.212)

If I just do f = fit(x,y,fitModel,fitOptions) and plot(f,cmap(k,:)) it works just fine.

How do I store the curves and then plot them all later in the script?

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Answer 1

Sindhuja Parimalarangan 2017-1-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/321307-how-do-i-store-and-use-fitobjects#answer_251646

在 MATLAB Online 中打开

You could store all the curve fit objects as elements of a cell arrays and then use cellfun to plot all the elements as shown in the following example :

load hahn1
f{1} = fit( temp, thermex, 'rat23' )
f{2} = fit( temp, thermex, 'exp2' )
f{3} = fit( temp, thermex, 'fourier3' )
%%plotting the above curves together %%
figure
hold on
cellfun(@plot,f)