Check for the presence of an intercept in a formula or in a fitted model

Source: R/tool_misc.R

The presence of an intercept is checked using the formula which is either provided as the argument of the function or extracted from a fitted model.

has.intercept(object, ...)

# Default S3 method
has.intercept(object, data = NULL, ...)

# S3 method for class 'formula'
has.intercept(object, data = NULL, ...)

# S3 method for class 'Formula'
has.intercept(object, rhs = NULL, data = NULL, ...)

# S3 method for class 'panelmodel'
has.intercept(object, ...)

# S3 method for class 'plm'
has.intercept(object, rhs = 1L, ...)

Arguments

object

a formula, a Formula or a fitted model (of class plm or panelmodel),

...

further arguments.

data

default is NULL and only needs to be changes to a data set if the formula contains a dot (.) to allow evaluation of the dot,

rhs

an integer (length > 1 is possible), indicating the parts of right hand sides of the formula to be evaluated for the presence of an intercept or NULL for all parts of the right hand side (relevant for the Formula and the plm methods),

Value

a logical