B îq\€ã@s dZddlZdgZddd„ZdS)z: Statistic functions used in `~astropy.modeling.fitting`. éNÚ leastsquarecCsP|dkr||ƒ}n |||ƒ}|dkr6t ||d¡St |||d¡SdS)as Least square statistic with optional weights. Parameters ---------- measured_vals : `~numpy.ndarray` Measured data values. updated_model : `~astropy.modeling.Model` Model with parameters set by the current iteration of the optimizer. weights : `~numpy.ndarray` Array of weights to apply to each residual. x : `~numpy.ndarray` Independent variable "x" to evaluate the model on. y : `~numpy.ndarray`, optional Independent variable "y" to evaluate the model on, for 2D models. Returns ------- res : float The sum of least squares. Né)ÚnpÚsum)Z measured_valsZ updated_modelZweightsÚxÚyZ model_vals©rú9lib/python3.7/site-packages/astropy/modeling/statistic.pyr s   )N)Ú__doc__ZnumpyrÚ__all__rrrrr Ús