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Evaluate an (Unevaluated) Expression
Syntax
eval(expr, envir=sys.frame(sys.parent()))
Value
This function evaluates the expression
expr
argument in the environment specified by
envir
and returns the compted value. If
envir
is not specified, then the environment where the call to
eval
is made is used.
See Also
expression
,
environment
.
Examples
eval(2 ^ 2 ^ 3) mEx <- expression(2^2^3); mEx; 1 + eval(mEx) eval({ xx <- pi; xx^2}) ; xx