curve fit for 4 variables, error 'not enough input arguments'

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Wu Ying 2015-7-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/228458-curve-fit-for-4-variables-error-not-enough-input-arguments

评论： Geoff Hayes 2015-7-5

function [fitresult, gof] = createFit(CO2NonWorkZone, diveIRI, CO2WorkZone,diffeIRI)
[xData, yData, zData, gData] = prepareData( CO2NonWorkZone, diveIRI, CO2WorkZone, diffeIRI );
ft = fittype( 'a + c*x*g*exp(w*y)', 'independent', {'x', 'y','g'}, 'dependent', 'z' );
opts = fitoptions( 'Method', 'NonlinearLeastSquares' );
opts.Display = 'Off';
opts.StartPoint = [0.371420685802539 0.0606895470210004 0.376869074010979];
% Fit model to data.
[fitresult, gof] = fit( [xData, yData, gData], zData, ft, opts );
figure( 'Name', 'untitled fit 1' );
h = plot( fitresult, [xData, yData, gData], zData );
legend( h, 'untitled fit 1', 'CO2WorkZone vs. CO2NonWorkZone, diveIRI, diffeIRI', 'Location', 'NorthEast' );
xlabel( 'CO2NonWorkZone' );
ylabel( 'diveIRI' );
zlabel( 'CO2WorkZone' );
glabel( 'diffeIRI' );
grid on

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Geoff Hayes 2015-7-5

Wu - please include the full error message (all text that is in red) so that we can get an idea of which line is generating the error message. Is it the call to createFit? Also, is this function the one from the File Exchange at here?

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