Load data frames into list

Question

I am trying to load a bunch *.Rdata into a list.

files <- paste0("name", 1:10, ".Rdata")
data <- lapply(files, load)

This creates a list, where in each element has the name of data frame, but nothing else.

If I redefine files such that it only contains the first file, and call:

load(files)

Then is "works", but the file in 'files' is asigned to the global enviroment, which is not what I would like.

I would like to end up with a list, which in each element contains the dataframe. Such that then when I do data processing I can lapply over the list.

Answer 1

You can try

lapply(files, function(x) mget(load(x)))

mget will return the value of the object(or objects) in a list. In your .Rdata files, there is only a single 'data.frame' object per file. So, even get should work.

In your code,

load(files[1]) 

The objects will be found in the global environment. Suppose, the object is 'd1', by typing 'd1' on the console, you get the value of the object. The same way

lapply(files, load, .GlobalEnv)

loads the object in the global environment, and can be accessed by typing. Your question, which I guess is to get the values in a list and that can be done with get or mget.