Pre-process input for multiple models return
apollo_preprocess(inputs, modelType, functionality, apollo_inputs)
List of settings
Character. Type of model, e.g. "mnl", "nl", "cnl", etc.
Character. Either "estimate","prediction","validate","zero_LL","conditionals","output","raw", or "preprocess". Only used for validation, it does not influence the return values.
List of main inputs to the model estimation process. See apollo_validateInputs.
The returned object depends on the value of argument operation