Load all R data files from specific folder - r

Question

I've got a lot of Rdata files which I want to combine in one dataframe.
My files, as an example, are:
file1.RData
file2.RData
file3.RData
All the datafiles have the structure: datafile$a and datafile$b. From all of the files above I would like to load take the variable $aand add this to and already existing dataframe called md. My problem isn't loading the files into the global environment, but processing the data in the RData file.
My code so far, which obviously doesn't work.
library(dplyr)
files <- list.files("correct directory", pattern="*.RData")
This returns the correct list of files.
I also know I need to lapply over a function.
lapply(files, myFun)
My problem is in the function. What I've got at the moment:
myFun <- function(files) {
load(files)
df <- data.frame(datafile$a)
md <- bind_rows(md, df)
}
The code above doesn't work, any idea how I get this to work?

Answer 1

Try
library(dplyr)
bind_rows(lapply(files, myFun))
# a
#1 1
#2 2
#3 3
#4 4
#5 5
#6 1
#7 2
#8 3
#9 4
#10 5
#11 6
#12 7
#13 8
#14 9
#15 10
#16 11
#17 12
#18 13
#19 14
#20 15
where
myFun <- function(files) {
load(files)
df <- data.frame(a= datafile$a)
}
data
datafile <- data.frame(a=1:5, b=6:10)
save(datafile, file='file1.RData')
datafile <- data.frame(a=1:15, b=16:30)
save(datafile, file='file2.RData')
files <- list.files(pattern='file\\d+.RData')
files