
As an example data set:

set.seed(1)
z.Date <- as.Date(paste(2003, 02, c(1, 3, 7, 9, 14), sep = "-"))
z <- zoo(cbind(left = rnorm(5), right = rnorm(5, sd = 0.2)), z.Date)

tt<-time(z)



fmt<-"%b-%d"

labs<-format(tt,fmt)
plot(z[,1], xlab = "Time", ylab = "")

If I plot the data and don't like the format of the x axis I can do this:

plot(z[,1], xlab = "Time", ylab = "",xaxt="n")

axis(side=1, at=tt[1:5],labels=labs[1:5],cex.axis=0.7)

But if I want to do a stacked plot:

plot(z, xlab = "Time", ylab = "",xaxt="n")
axis(side=1, at=tt[1:5],labels=labs[1:5],cex.axis=0.7)



The axis command has no effect. Can someone explain what is going on and how to format a stacked plot like this?


Thanks 		 	   		  
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