[R] How download Yahoo Quote?

[Yumin]

   Hi Michael:

   I tried to simplify the code, but still failed.

*            con <- url("http://quote.yahoo.com") 
            if(!inherits(try(open(con), silent = TRUE), "try-error")) 
           { 
               close(con)                       

               x <- get.hist.quote(instrument = "ibm", quote = c("Cl",
"Vol")) 
               plot(x, main = "International Business Machines Corp") 
           }*

   It says:
 *             Warning message:
               In open.connection(con) : too many redirects, aborting ...*

    The more, it doesn't accept " library(quantmod)" and says:

               *Error in library(quantmod) : there is no package called
'quantmod'*

    Please help me!

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