is.empty.model
Does a Model Contain any Predictors

### Description

Report if a model or formula contains any predictor terms.

### Usage

    is.empty.model(x)

### Arguments

x | a model object, formula, or something that terms(x) can turn into a terms object.

Value
a A logical value saying if the model represented by that formula has any predictors in it.
See Also
lm, terms, formula.
Examples

    is.empty.model(lm(Fuel ~ -1, data=Sdatasets::fuel.frame))
    is.empty.model(response ~ -1)
    is.empty.model(response ~ 1)

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