utility to check formulas and extract variable names they calculate values for — formula_varname • EJAM

utility to check formulas and extract variable names they calculate values for

Usage

formula_varname(myforms)

Arguments

myforms: see calc_byformula()

Value

a vector as long as myforms input vector

Details

custom_doaggregate() may use calc_ejam()
calc_ejam() uses calc_byformula()
calc_byformula() uses formula_varname() and maybe source_this_codetext()

Examples

EJAM:::formula_varname(c("z=10", "b<- 1", "c <- 34", " h = 1+1", "   q=2+2"))
head(cbind(EJAM:::formula_varname(formulas_d), formulas_d))