σ šίΘ[c@`sMdZddlmZmZmZmZddlZdgZdd„Z dS(u: Statistic functions used in `~astropy.modeling.fitting`. i(tabsolute_importtunicode_literalstdivisiontprint_functionNu leastsquarecC`sh|dkr||ƒ}n|||ƒ}|dkrKtj||dƒStj|||dƒSdS(us 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. iN(tNonetnptsum(t measured_valst updated_modeltweightstxtyt model_vals((s9lib/python2.7/site-packages/astropy/modeling/statistic.pyt leastsquares   ( t__doc__t __future__RRRRtnumpyRt__all__RR (((s9lib/python2.7/site-packages/astropy/modeling/statistic.pyts"