st: loop: how can I download CSV files and append it

[Daniel Marcelino <dmsilva.br@gmail.com>]

Hello all,
I am wondering if someone could point me the way to get each .CSV file
from a website list stored in a column say "sites" and also
aggregating it in a master file like "big.data".
I perfomed this task using R package, but I prefer do the same work on Stata.

So, basically I need to download files which web addresses are in each
row of column "sites". After read a file, it need to be appended to
the left one until finished the web adresses, so the output
big.data.dta must be all raw data found at websites.

big.data <- NULL
base <-NULL

for (i in sites) {
try(base <- read.csv2(i, header=T, as.is=T), TRUE)
if(!is.null(base)) big.data <- rbind(big.data, base)
write.table(big.data, file ="ap.csv",
sep=";", row.names=F, na="")
}
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