Clearly not. I don't know why you think that should be the expected behaviour.
They are different variables.
---------------------------------------------------------------------------
Jeff Newmiller The ..... ..... Go Live...
DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go...
Live: OO#.. Dead: OO#.. Playing
Research Engineer (Solar/Batteries O.O#. #.O#. with
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Sent from my phone. Please excuse my brevity.
On March 17, 2014 12:11:09 AM PDT, AROONALOK PYNE <aroonalok.p...@gmail.com>
wrote:
>Thanks a lot Jeff for the reply. I usually do what you said i.e,
>return a value from the function and save it in the calling
>environment when I call the function, but I just wanted to experiment
>with the special assignment operator. Could you clarify a small doubt
>of mine :
>
>I agree that x refers to the local version inside foo(). But, once I
>do x <<- 8 inside foo() (as done in the code), isn't the local version
>of x supposed to change too?
>
>On 3/17/14, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote:
>> Because x refers to the local version, not the global one.
>>
>> In case you have not read this before, using <<- is a really really
>bad
>> idea. Your code will become confusing and likely be wrong if you
>ignore this
>> warning. Return a value from the function and save it in the calling
>> environment when you call the function.
>>
>---------------------------------------------------------------------------
>> Jeff Newmiller The ..... ..... Go
>Live...
>> DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live
>Go...
>> Live: OO#.. Dead: OO#..
>Playing
>> Research Engineer (Solar/Batteries O.O#. #.O#. with
>> /Software/Embedded Controllers) .OO#. .OO#.
>rocks...1k
>>
>---------------------------------------------------------------------------
>>
>> Sent from my phone. Please excuse my brevity.
>>
>> On March 16, 2014 9:06:13 PM PDT, AROONALOK PYNE
><aroonalok.p...@gmail.com>
>> wrote:
>>>Hi
>>>
>>>Please explain why the function 'foo()' is not printing x as 8 in the
>>>following code :
>>>
>>>> foo <- function(){
>>>+ x <- 10
>>>+ if(x){
>>>+ x <<- 8
>>>+ }
>>>+ print(x)
>>>+ }
>>>> foo()
>>>[1] 10
>>>> x
>>>[1] 8
>>>>
>>
>>
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