Hey everybody,
it would be really appreciate if you knew the solution to the following
problem.
I am trying to load data from the internet into R without having to save
them. However, I need to acess a different website for each dataset. So I
want to alternate an element in the URL. Eventually, I want to fill a 3
dimensional matrix/array where each slice is a two-dimensional matrix from
the corresponding website. For example:
###############################################################################
ID=c(1,5,6,8,10) #ID of dataset/website, each dataset
contains a matrix [4x6]
data=array(numeric(0),length(ID) ,4,6) #empty array [5x4x6]
for (kk in 1:length(ID)) {
url <-cat("http://ministry.gov/case",ID[kk],"_agencyk";) #should return
"http://ministry.gov/case1_agencyk"; for kk=1, etc.
import.data <- as.matrix( read.table(url) )
for (tt in 1:4) {
for (mm in 1:6) {
data[kk,tt,mm] <- import.data[tt,mm]
}}}
################################################################################
I got all to work, but the problem is assembling the URL. In the code above
url just returns NULL. Once that is solved I have trouble because
read.table needs the URL to be in "". If I put read.table("url") R wont
recognize it as the url I defined earlier. But I also do not know how to use
cat() to get " at beginning and end.
If I am approaching this in a totally dorky way (likely...), please let me
know, too.
Thank you!! Frauke
Frauke Hoss
PhD student Carnegie Mellon
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