[R] syntax for batching rbind process

[Erik Iverson]

Toby Gass wrote:
> Dear helpeRs,
> 
> I am attempting to read in a series of csv files so I can bind them 
> into one large dataframe.  I have written the following script:
> 
> test <- list.files(".", pattern = "csv")  #lline 1
> imp <- list()                                    #line 2
> for (i in 1:length(test)) {                    #line 3
> imp[i] <- read.csv(test[i])                  #line 4
> }                                                    #line 5
> works <- do.call(rbind, imp)              #line 6
> write.csv(works, "allmet.csv")           #line 7
> 
> This script has an error at line 4.  imp[i] contains only the value 
> of the first element of test[i]; in other words, every element of 
> imp[i] equals test[i] [1,1].  Otherwise, the script works.  Could 
> someone please enlighten me as to the correct syntax for line 4?

Just use lapply instead of a loop, easier syntax.

imp <- lapply(test, read.csv)
do.call(rbind, imp)