On 04/01/2010 7:31 PM, Steven Kang wrote:
Hi, all
Basically, I have unknown number of data that need to be imported and
collapsed row-wisely.
The code below works fine, however the "rbind" function may require 50
arguments if there are 50 data files...
Thus, I would like to explore whether there are any methods in using dynamic
objects (i.e from the resulting objects in the for loop) as an argument in
the *"rbind"* function.
setwd(.........)
import.files <- c("a.txt", "b.txt", "c.txt", "d.txt", "e.txt")
for (i in 1:length(import.files)) {
assign(paste("imp", i, sep = "."), read.delim(eval(paste(".\\",
import.files[i], sep = "")), header = TRUE))
Computing names like this is almost always a bad idea. It's better to
just put the items in a list:
imp <- list()
for (i in 1:length(import.files)) {
imp[[i]] <- read.delim(eval(paste(".\\",
import.files[i], sep = "")), header = TRUE)
}
Then to bind them all, simply use do.call(rbind, imp).
Duncan Murdoch
}
combined <- rbind(*imp.1, imp.2, imp.3, imp.4, imp.5, imp.6*)
Your expertise in resolving this issue would be greatly appreciated.
Steve
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