[R] Loading an .RData file and assigning the loaded objects within a loop

[Barry Rowlingson]

Within lapply load the file and return the value of the thing or
things in the file you want. Something like this:

 > files
[1] "x1.RData" "x2.RData" "x3.RData" "x4.RData"

 > lapply(files,function(z){load(z);x})
[[1]]
[1] 1

[[2]]
[1] 22

[[3]]
[1] 333

[[4]]
[1] 4444

Each of my files contains a single number stored in an object called
'x'. Within the loop 'x' has the value just loaded from the file.

Another method is to use the environment argument of load to save into
an environment other than the global one...




On Sat, Jun 1, 2013 at 11:52 AM, Jim Holtman <jholtman at gmail.com> wrote:
> use 'lapply' to read in the .RData file.  Therefore each file is stored as an element of a list thatb
>  you can access and change as necessary.
>
> Sent from my iPad
>
> On Jun 1, 2013, at 6:18, Jeremy Ng <jeremy.ng.wk1990 at gmail.com> wrote:
>
>> Hi all,
>>
>> I tried to look this up online, but am still feeling a little stuck.
>>
>> I have a bunch of Rdata files in side my directory, and I would like to
>> load all of them in a loop. Each time the next is read in, it would
>> over-write the previously read in object because they will be assigned the
>> same workspace object name.
>>
>> Is there anyway for each individually read in Rdata object to be assigned a
>> new name?
>>
>> Thanks!
>> JEremy
>>
>>    [[alternative HTML version deleted]]
>>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.