Thanks Duncan,
I just saw another, but similar, solution for this in
http://stackoverflow.com/questions/11084395/save-object-using-variable-with-object-name
,
and it is:
: save(list=nn, file="f.RData")
Thanks again,
-Sergio.
On Thu, Nov 12, 2015 at 8:57 PM, Duncan Murdoch <murdoch.dun...@gmail.com>
wrote:
> On 12/11/2015 6:41 PM, Julio Sergio Santana wrote:
>
>> I have to store (in a file) an R object that was created with is name as
>> a string of characters, as follows:
>>
>> : nn <- "xxx"
>> : assign(nn, 5)
>> : xxx
>> [1] 5
>>
>> I don't want to store the object nn but the object xxx. I tried the
>> following two expressions but none of them worked:
>>
>> : save(get(nn), file="f.RData")
>> Error in save(get(nn), file = "f.RData") : object ‘get(nn)’ not found
>>
>> : save(eval(nn), file="f.RData")
>> Error in save(eval(nn), file = "f.RData") : object ‘eval(nn)’ not
>> found
>>
>> I know that both save(xxx, ..), and save("xxx", ..) work, but the fact
>> is that the string is going to be provided by an user:
>>
>> : nn <- readline("Your variable->")
>>
>> and
>> : save(nn, file="f.RData")
>> stores the objet nn not xxx
>>
>> Do you have any comments on this?
>>
>
> I believe
>
> do.call(save, list(as.name(nn), file = "f.RData"))
>
> should do what you want. There are probably other ways, maybe simpler
> ones.
>
> If you're interested, the theory here is that do.call() constructs a call
> to the first argument, with arguments found by evaluating the second
> argument.
>
> Duncan Murdoch
>
--
[image: Julio Sergio Santana on about.me]
Julio Sergio Santana
about.me/juliosergio00
<http://about.me/juliosergio00>
Julio Sergio Santana
Instituto Mexicano de Tecnología del Agua
Tel +52 777 3293600 x 826
Tel/Fax +52 777 3293683
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