How to Limit Variable Scope

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Limiting variable scope

Is there a way to force R to ignore all objects set in the global environment? For example, let's say I have 'df' as an object outside of my function and I wish to use the same shorthand within my function, but not in reference to the object in the global environment

Answer 1

See this question: "Limiting variable scope".

Answer 2

So what? The df in your function won't be the global df.

> df = 1
> foo = function(x){df=x*2;return(df)}

Now when you do foo(df) the df inside the function isn't the global df. So what's your problem? I guess it can only be a problem if you want the global df inside your function as well, in which case:

• don't use globals in functions - it breaks the functional style
• use a different name if it's a different thing.