[R-SIG-Finance] quantmod, mfrow, plot question

[Db]

require(quantmod)
sym <-c("^GSPC", "TIP")
getSymbols(sym, from='2009-01-06', to=Sys.Date())
z <-to.monthly(TIP)
z <-z[,6]
z1 <-z-mean(z)
par(mfrow=c(3,1))
plot(z)
# acf,pacf are plotting already 
acf(ts(z1))
pacf(ts(z1))

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