[R] strange list structure question

[Charles C. Berry]

On Mon, 3 Nov 2008, markleeds at verizon.net wrote:

> Hi Rolf:  it's not what's inside the lapplys that i was interested in which 
> probably made my question more confusing. all i was trying to show was that,
>
> in EXAMPLE 1, the name comes back at the top level of the result.
>
> in EXAMPLE 2, i can use the name GGG inside the lapply functon to do whatever 
> ( the whatever was just a stupid example which can be disregarded ).
>
> my question is : is it possible to do both: be able to return the name at the 
> top level but also mess with the name inside the lapply.


Mark,

Does this idiom help?

 	mapply( my.fun, names(x), x )

where my.fun takes two args: name.x.i and x.i (say).

HTH,

Chuck



> i'm ccing the list 
> again because it's quite clear that my question was ill posed. thanks for 
> that enlightenment. I can't show my actual example because it's too 
> complicated but essentially i want to be able to return GGG at the top level 
> like EXAMPLE 1 does but also use GGG inside the lapply like EXAMPLE 2 does. 
> Thanks for telling me that i'm confusing !!!!
>
>
>
>
> On Mon, Nov 3, 2008 at  9:10 PM, Rolf Turner wrote:
>
>>  Mark:
>>
>>  What the <expletive deleted> are you actually trying to do?  Your two
>>  applications
>>  of lapply() do in effect quite different things.  The first gives a list
>>  of
>>  length 1; the single entry is named ``GGG''; this entry is a list of
>>  length 3.
>>
>>  The second application gives a list of length 3.  Each entry of this list
>>  is a vector
>>  of length 1. The single entry of each such vector has name ``GGG'' just as
>>  you requested.
>>
>>  R does what you ask it to do.  You have to be clear in your own mind as to
>>  just
>>  what you're asking.
>>
>>   cheers,
>>
>>    Rolf
>>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901