On Sun, Jan 9, 2011 at 8:13 PM, Jim Burke <[email protected]> wrote: > Hello everyone, > > I have a simple histogram of gasoline prices going back a few years that I > want to insert a line graph of consumer price index (cpi) over the > histogram. I have looked through the "Lattice" book by Deepayan Sarkar but > don't see anything there. How might this be done? An example would be > wonderful. > > Current code snippet follows. For example additional field to add as a line > graph would be a cpi calculation like "gas_data$regular * (2010_cpi / > gas_data$year )". > > xyplot( regular ~ as.Date(gas_data$dates,"%b %d, %Y") , data = gas_data, > type = c("g", "h" ))
xyplot.zoo in the zoo package has facilities for drawing multiple time series using lattice graphics or in different panels. The documentation has many examples. library(zoo) library(lattice) z1 <- zoo(1:6) z2 <- z1^2 z <- cbind(z1, z2) xyplot(z) # different panels xyplot(z, screen = 1) # all on one panel ?xyplot.zoo example(xyplot.zoo) vignette(package = "zoo") # lists available vignettes -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
