Displaying 1 result from an estimated 1 matches for "variable_outside_funct".
2010 Jun 25
1
exists() and functions
I'm a bit confused about how exists() work within a function -- I want
to test for unassigned variables, but I'm doing tests in the main
environment to figure out the function, so the variables DO exist in
the parent environment of a function call.
Why does:
myfunction <- function(variable_outside_function)
{
print(exists("variable_outside_function",inherit=FALSE))
print(exists("another_variable_outside_function",inherit=FALSE))
}
myfunction()
Return:
[1] TRUE
[1] FALSE
I didn't assign anything to variable_outside_function, so I'm unclear
why it thinks it exists......