
A few packages have support for basic download from Yahoo Finance. If that's what you are trying to achieve - you may want to try quantmod (getSymbols function) or tseries (get.hist.quote function). If you want to do something not supported yet - first take a look at their source code.

Regards,
Ivan

> From: kmm@csusb.edu
> Date: Tue, 12 Jan 2010 22:25:17 -0800
> To: r-help@r-project.org
> Subject: Re: [R] Dynamic file / url name with read.csv
> 
> 
> A few suggestions:
>   Don't mix ' and "
>   Use paste()
>   Don't include an extraneous ;
> 
> SymA<- "SPY"
> Sym1<- paste("http://ichart.finance.yahoo.com/table.csv?s=",SymA,"&ignore=.csv",sep="")
> Symbol<- read.csv(Sym1, stringsAsFactors=F)
> 
> 
> On Jan 12, 2010, at 10:03 PM, B S wrote:
> > 
> > Hi- 
> > 
> > I would like to be able to change the value of SymA below and download a file from the corresponding URL.  Hardcoded, this line works fine: 
> > 
> > Symbol<- read.csv("http://ichart.finance.yahoo.com/table.csv?s=SPY&ignore=.csv", stringsAsFactors=F)
> > 
> > However, when I incorporate using a variable for the ticker, it no longer works.  
> > 
> > SymA<- "SPY"
> > Sym1<- cat('http://ichart.finance.yahoo.com/table.csv?s=",SymA,"&ignore=.csv",sep="";)
> > Symbol<- read.csv(Sym1, stringsAsFactors=F)
> > 
> > I know that the problem lies in the concatenation, but I've tried different variations of cat() and toString() (and others) with SymA and Sym1 but cannot seem to get a string together that will work.  Would appreciate any suggestions for this simple problem?? 
> > 
> > Thank you. 
> > 
> > 
> > 
> > 
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> > and provide commented, minimal, self-contained, reproducible code.
> 
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
 		 	   		  
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