formula.to.structure
## S3 method for class 'to.structure' formula(formula, data, label = "mu")
formula: an object of class "formula" (or one that can be coerced to that class): a symbolic description of the model to be fitted.data: an optional data frame, list or environment (or object coercible by as.data.frame to a data frame) containing the variables in the model. If not found in data, the variables are taken from environment(formula), typically the environment from which glm is called.label: An optional character naming the linear predictor.