You can use sprintf:

u <- sprintf('
http://ichart.yahoo.com/table.csv?s=%s.MC&a=00&b=1&c=2003&d=05&e=23&f=2009&g=d&ignore=.csv<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>',
"TEF")

download.file(u, 'c:\\projects\\stock data\\data\\test.csv',quiet=TRUE)

On Tue, Jun 23, 2009 at 2:40 PM, David Young <dyoung@telefonica.net> 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?
>
> Thanks in advance for any assistance.
>
>
>
> --
> Best regards,
>
> David Young
> Marketing and Statistical Consultant
> Madrid, Spain
> +34 913 540 381
> http://www.linkedin.com/in/europedavidyoung
>
>                          mailto:dyoung@telefonica.net
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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