I'm just want to do curve fitting, but it doesn't work as I want.
I ran a curve fitting tool with some conditions, and the result was plausible.
And now I want to do it in the command line because I want to do it automatically.
To do that, I utilize the "code generate" in the Curve Fitting Tool.
But there is no information about coefficients in the generated code. (in the tool box I can see the result coefficients)
How can I obtain coefficients from the Curve Fitting Tool??
the generated Code is as below.
%===============================================================================
%%Fit: 'untitled fit 1'.
[xData, yData, zData] = prepareSurfaceData( soc_cur, time_cur, y );% Set up fittype and options.
ft = fittype( '(a0*exp(a1*x) + a2 + a3*x + a4*x.^2 + a5*x.^3) - ( 2.2*(b0*exp(b1*x) + b2) + (0.31 - 2.2)*(c0*exp(c1*x) + c2).*exp(-y./((c0*exp(c1*x) + c2).*(d0*exp(d1*x) + d2))) + 2.2 * (c0*exp(c1*x) + c2) + (0.31 - 2.2)*(e0*exp(e1*x) + e2).*exp(-y./((e0*exp(e1*x) + e2).*(f0*exp(f1*x) + f2))) + 2.2 * (e0*exp(e1*x) + e2));', 'independent', {'x', 'y'}, 'dependent', 'z' );opts = fitoptions( ft );opts.Display = 'Off';opts.Lower = [-Inf -Inf 0.0001 0.0001 -Inf 0.0001 0.0001 -Inf 0.0001 0.0001 -Inf 0.0001 -Inf -Inf 0.0001 0.0001 -Inf 0.0001 -Inf -Inf 0.0001];opts.StartPoint = [-1 -1 1 1 -1 1 1 -1 1 1 -1 1 -1 -1 1 1 -1 1 -1 -1 1];opts.Upper = [-0.0001 -0.0001 Inf Inf -0.0001 Inf Inf -0.0001 Inf Inf -0.0001 Inf -0.0001 -0.0001 Inf Inf -0.0001 Inf -0.0001 -0.0001 Inf];% Fit model to data.
[fitresult, gof] = fit( [xData, yData], zData, ft, opts );% Plot fit with data.
figure( 'Name', 'untitled fit 1' );h = plot( fitresult, [xData, yData], zData );legend( h, 'untitled fit 1', 'y vs. soc_cur, time_cur', 'Location', 'NorthEast' );% Label axes
xlabel( 'soc_cur' );ylabel( 'time_cur' );zlabel( 'y' );grid onview( -39.5, 30 );<<C—Users–ELPL–Desktop–test.jpg>>
Thanks in advance.
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