Currently, one can set the 'ObjFun' option to select between 'ssr' (sum of squared residuals), 'chi2' (chi-square), 'chi2red' (reduced chi-square).
For a single signal, these quantities differ only by constant factors, so have no effect on minimization. For global fitting, 'ssr' does not include the noise, but the other do. Noise levels should always be included in global fits when available..
Bottom line: We should remove this option, since it doesn't affect minimization.
Currently, one can set the
'ObjFun'option to select between'ssr'(sum of squared residuals),'chi2'(chi-square), 'chi2red'(reduced chi-square).For a single signal, these quantities differ only by constant factors, so have no effect on minimization. For global fitting,
'ssr'does not include the noise, but the other do. Noise levels should always be included in global fits when available..Bottom line: We should remove this option, since it doesn't affect minimization.