错误使用 mlecustom>llf_pdfcdf (line 440)
The PDF function returned negative or zero values.
出错 fminsearch (line 190)
fv(:,1) = funfcn(x,varargin{:});
出错 mlecustom (line 183)
[phat,nll,err,output] = ...
出错 mle (line 231)
[phat, pci] = mlecustom(data,varargin{:})