On Tuesday, June 23, 2009 1:40 PM, David Young wrote:
> ...Hi I'm new to R and would like to
> implement a SAS-like macro variable in R.
> What I'd like to do is take the simple R
> code below and change the "=TEF" to
> different letters to refer to different
> companies' data for download...
> # DOWNLOADS FILES FROM YAHOO INTERNET
> download.file('http://ichart.yahoo.com/table.csv?s=TEF.MC
> &a=00&b=1&c=2003&d=05&e=23&f=2009&g=d&ignore=.csv',
> 'c:\\projects\\stock data\\data\\test.csv',quiet=TRUE)
> ...As you can see the text I want to change
> is within the quoted Internet address. Is
> this possible in R...
How about something like:
download.ichart <- function ( symbol , destpath = 'c:/projects/stock
data/data/' ) {
url <- paste (
"http://ichart.yahoo.com/table.csv?s=";
, substitute ( symbol )
, ".MC&a=00&b=1&c=2003&d=05&e=23&f=2009&g=d&ignore=.csv"
, sep = ""
)
destfile <- paste ( destpath , substitute ( symbol ) , ".csv" , sep = "" )
download.file ( url , destfile , quiet = TRUE )
}
download.ichart ( "TEF" )
--
David
-----------------------------------------------------
David Huffer, Ph.D. Senior Statistician
CSOSA/Washington, DC [email protected]
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