could someone please explain to me what these various environment functions do specifically? ie which one returns what frame? i am thoroughly confused after reading the documentation (http://stat.ethz.ch/R-manual/R-patched/library/base/html/sys.parent.html)
有人可以向我解释这些不同的环境功能具体做什么？即哪一个返回什么帧？阅读文档后我感到非常困惑（http://stat.ethz.ch/R-manual/R-patched/library/base/html/sys.parent.html）
Let's put some structure on the question:
让我们在问题上加上一些结构：
x = 1; y=2; z=3;
f = function() { ls(); ls(envir=sys.frame());}
#this first prints the contents of this function and then of the global environment
I am trying to understand how one can access environments of calling functions and to know which environment you are in. For example g could have called f:
我试图了解如何访问调用函数的环境以及了解您所处的环境。例如，g可以调用f：
g = function() { somevar=1; f() }
If I wanted to get the contents of g, how would i do that? What is the difference between a frame and an environment?
如果我想获得g的内容，我该怎么做？框架和环境有什么区别？
1 个解决方案
#1
2
parent.frame() refers to the calling environment. You normally don't need the rest of them. For your example use this to list somevar :
parent.frame（）指的是调用环境。你通常不需要其余的。对于您的示例，使用此列出somevar：
f <- function() ls(parent.frame())
#1
2
parent.frame() refers to the calling environment. You normally don't need the rest of them. For your example use this to list somevar :
parent.frame（）指的是调用环境。你通常不需要其余的。对于您的示例，使用此列出somevar：
f <- function() ls(parent.frame())