http://adv-r.had.co.nz/Environments.html Advanced R - Environments Environments Environments environment scoping/environment http://adv-r.had.co.nz/Environments.html http://adv-r.had.co.nz/Environments.html http://adv-r.had.co.nz/Environments.html Environments functions have environments scoping/environment this chapter of Adv R enclosing environment Hadley's Advanced R book this chapter of Adv R Environments http://adv-r.had.co.nz/Environments.html Environments