Last data update: 2014.03.03
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R: Evaluate a part of a formula
evalSubFormula | R Documentation |
Evaluate a part of a formula
Description
Evaluate a part of a formula
Usage
evalSubFormula(x, data = NULL, ops = c("+", "&"), env = parent.frame())
Arguments
x |
an object appearing as a subformula (typically a name or a call)
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data |
a data frame or environment in which things are evaluated
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ops |
a vector of operators that are not evaluated as operators but
instead used to further split x
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env |
an environment in which to search for objects not in data .
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Value
a data frame containing the terms of the evaluated subformula
Examples
if (require(mosaicData)) {
data(CPS85)
cps <- CPS85[1:6,]
cps
evalSubFormula( rhs( ~ married & sector), data=cps )
}
Results
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