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Curve fitting with 5 variables

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Redwood
Redwood 2013-4-14
Dear Matlab experts,
I want to code curve fitting with 5 variables.
I got this message from Matlab, "Too many input arguments."
I added my code here, and I want to know how to solve this problem.
Thank you in advance.
Sincerely yours,
Redwood
%%Fit: 'China'.
[xData, yData, wData, cData, zData] = prepareSurfaceData( x, y, w, c, z );
% Set up fittype and options.
ft = fittype( 'a+ b*x +c*y + d*w + e*c', 'independent', {'x', 'y', 'w', 'c'}, 'dependent', 'z' );
opts = fitoptions( ft );
opts.Display = 'Off';
opts.Lower = [0 0 0 0 0];
opts.StartPoint = [0.01 0.01 0.01 0.01 0.01];
opts.Upper = [Inf Inf Inf Inf Inf];
% Fit model to data.
[fitresult, gof] = fit( [xData, yData, wData, cData], zData, ft, opts );
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Redwood
Redwood 2013-4-15
I got this in Matlab.
Error using prepareSurfaceData (line 31) Too many input arguments.
Sincerely your,
Redwood
Walter Roberson
Walter Roberson 2013-4-15
prepareSurfaceData's changes are specifically documented; you can undertake them yourself; see http://www.mathworks.com/help/curvefit/preparesurfacedata.html

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