is.empty.model
Test if a Model's Formula is Empty
R's formula notation allows models with no intercept and no
predictors. These require special handling internally.
is.empty.model()
checks whether an object describes an empty
model.
- Keywords
- models
Usage
is.empty.model(x)
Arguments
- x
- A
terms
object or an object with aterms
method.
Value
TRUE
if the model is empty
See Also
Examples
library(stats)
y <- rnorm(20)
is.empty.model(y ~ 0)
is.empty.model(y ~ -1)
is.empty.model(lm(y ~ 0))
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