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crunch
2008 Nov 04
2
ggplot & annotating charts
...n("1990-8-2")
gulf2 <- as.yearmon("1991-2-28")
asia1 <- as.yearmon("1997-9-11")
asia2 <- as.yearmon("1998-11-14")
sep1 <- as.yearmon("2001-9-11")
sep2 <- as.yearmon("2002-9-14")
crunch1 <- as.yearmon("2007-8-9")
crunch2 <- as.yearmon("2009-11-14")
plot(vix.close, type = "n",ylab="S&P500 volatility",
xlab="Date",cex.axis=1.5,cex.lab=1.7,ylim=c(0,90) )
rect(gulf1, par("usr")[3], gulf2,
par("usr")[4],col=rgb(195,188,175,maxColorValue=255),border=...