/usr/share/psychtoolbox-3/PsychGamma/FitGammaWeib.m is in psychtoolbox-3-common 3.0.11.20140816.dfsg1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | function [fit_out,x,err] = FitGammaWeib(values_in,measurements,values_out,x0)
% [fit_out,x,err] = FitGammaWeib(values_in,measurements,values_out,x0)
%
% Fits a Weibull function to the passed gamma data.
%
% 10/3/93 dhb Created from jms code to fit psychometric functions
% 3/4/05 dhb Conditionals for optimization toolbox version.
% dhb Encapsulate error calculation
% Bounds
vlb = [1e-5 1e-5]';
vub = [1e5 10.0]';
% Check for needed optimization toolbox, and version.
if (exist('fmincon') == 2)
options = optimset;
options = optimset(options,'Diagnostics','off','Display','off');
options = optimset(options,'LargeScale','off');
x = fmincon('FitGammaWeibFun',x0,[],[],[],[],vlb,vub,[],options,values_in,measurements);
elseif (exist('constr') == 2)
options = foptions;
options(1) = 0;
options(14) = 600;
x = constr('FitGammaWeibFun',x0,options,vlb,vub,[],values_in,measurements);
else
error('FitGammaWeib requires the optional Matlab Optimization Toolbox from Mathworks');
end
% Now compute fit values and error to data for return
fit_out = ComputeGammaWeib(x,values_out);
err = FitGammaWeibFun(x,values_in,measurements);
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