Use Constraint to constrain your models parameters.
Todo
Include more built-in Constraints.
zfit.constraint.SimpleConstraint(func, params)
zfit.constraint.SimpleConstraint
Constraint from a (function returning a) Tensor.
zfit.constraint.GaussianConstraint(params, …)
zfit.constraint.GaussianConstraint
Gaussian constraints on a list of parameters to some observed values with uncertainties.
zfit.constraint.nll_gaussian(params, …)
zfit.constraint.nll_gaussian
Return negative log likelihood graph for gaussian constraints on a list of parameters.