Removes the intercept term from a formula if it is included

Source: R/helper-intercept.r

Often, we prefer not to have an intercept term in a model, but user-specified formulas might have included the intercept term. In this case, we wish to update the formula but without the intercept term. This is especially true in numerous classification models, where errors and doom can occur if an intercept is included in the model.

no_intercept(formula, data)

Arguments

formula

a model formula to remove its intercept term
data

data frame

Value

formula with no intercept term

Examples

iris_formula <- formula(Species ~ .)
sparsediscrim:::no_intercept(iris_formula, data = iris)

#> Species ~ Sepal.Length + Sepal.Width + Petal.Length + Petal.Width - 
#>     1
#> <environment: 0x5594a4dc9728>