zfit.constraint.
nll_gaussian
Return negative log likelihood graph for gaussian constraints on a list of parameters.
params (~ParamTypeInput) – The parameters to constraint.
observation (Union[int, float, complex, Tensor, ForwardRef]) – observed values of the parameter.
Union
int
float
complex
Tensor
ForwardRef
uncertainty (Union[int, float, complex, Tensor, ForwardRef]) – Uncertainties or covariance/error. matrix of the observed values. Can either be a single value, a list of values, an array or a tensor.
The constraint object.
ShapeIncompatibleError – if params, mu and sigma don’t have the same size.