nll_gaussian¶
- zfit.constraint.nll_gaussian(params, observation, uncertainty)[source]¶
Return negative log likelihood graph for gaussian constraints on a list of parameters.
- Parameters
params (~ParamTypeInput) – The parameters to constraint.
observation (
Union[int,float,complex,Tensor,ForwardRef]) – observed values of the parameter.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.
- Return type
Tensor- Returns
The constraint object.
- Raises
ShapeIncompatibleError – if params, mu and sigma don’t have the same size.