installExprFunction: Install an expression as a function
In ymd526442121/Rproject_shiny: Web Application Framework for R

Description Usage Arguments Details See Also

Installs an expression in the given environment as a function, and registers debug hooks so that breakpoints may be set in the function.

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installExprFunction(expr, name, eval.env = parent.frame(2), quoted = FALSE,
  assign.env = parent.frame(1), label = deparse(sys.call(-1)[[1]]),
  wrappedWithLabel = TRUE, ..stacktraceon = FALSE)

`expr`	A quoted or unquoted expression
`name`	The name the function should be given
`eval.env`	The desired environment for the function. Defaults to the calling environment two steps back.
`quoted`	Is the expression quoted?
`assign.env`	The environment in which the function should be assigned.
`label`	A label for the object to be shown in the debugger. Defaults to the name of the calling function.
`wrappedWithLabel, ..stacktraceon`	Advanced use only. For stack manipulation purposes; see `stacktrace`.

This function can replace exprToFunction as follows: we may use func <- exprToFunction(expr) if we do not want the debug hooks, or installExprFunction(expr, "func") if we do. Both approaches create a function named func in the current environment.

Wraps exprToFunction; see that method's documentation for more documentation and examples.

ymd526442121/Rproject_shiny documentation built on May 4, 2019, 5:31 p.m.