| asOneSidedFormula {stats} | R Documentation | 
Names, expressions, numeric values, and character strings are converted to
one-sided formulas. If object is a formula, it must be
one-sided, in which case it is returned unaltered.
asOneSidedFormula(object)
object | 
a one-sided formula, an expression, a numeric value, or a character string. | 
a one-sided formula representing object
Jose Pinheiro and Douglas Bates
asOneSidedFormula("age")
asOneSidedFormula(~ age)