Restrict access to variables in parent environment
On 14/05/2010 10:14 AM, thmsfuller066 at gmail.com wrote:
Hello All, By default, a reference of a variable in a function cause R to look for the variable in the parent environment if it is not available in the current environment (without generating any errors or warnings). I'm wondering if there is a way to revert this behaviors, such that it will not look for the parent environment and will generate an error if the variable is not available in the current environment. Is this tuning has to be done at the C level?
You could do that by setting the environment of the function to emptyenv(), but it will not be pretty. Remember that everything in R is an object, so you won't have access to the base level objects like +, or mean, or any other function. Duncan Murdoch