Evaluate an (unevaluated) expression
eval evaluates an R expression in a specified environment.
NOTE: This man page is for the eval S4 generic function
defined in the BiocGenerics package.
See ?base::eval for the default method
(defined in the base package).
Bioconductor packages can define specific methods for objects
not supported by the default method.
eval(expr, envir=parent.frame(),
enclos=if (is.list(envir) || is.pairlist(envir))
parent.frame() else baseenv())expr |
An object to be evaluated.
May be any object supported by the default method
(see |
envir |
The environment in which |
enclos |
See |
See ?base::eval for the value returned by the
default method.
Specific methods defined in Bioconductor packages should behave as consistently as possible with the default method.
base::eval for the default eval method.
showMethods for displaying a summary of the
methods defined for a given generic function.
selectMethod for getting the definition of
a specific method.
eval,expression,Vector-method in the IRanges
package for an example of a specific eval method (defined for
when the expr and envir arguments are an
expression and a Vector object,
respectively).
BiocGenerics for a summary of all the generics defined in the BiocGenerics package.
eval # note the dispatch on 'expr' and 'envir' args only
showMethods("eval")
selectMethod("eval", c("ANY", "ANY")) # the default methodPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.