Try this: # two simulated series set.seed(123) ts.sim <- arima.sim(list(order = c(1,1,0), ar = 0.7), n = 70) ts.sim <- ts(c(ts.sim), start = 1940) ts.sim2 <- arima.sim(list(order = c(1,1,0), ar = 0.7), n = 12*70) ts.sim2 <- ts(c(ts.sim2), start = 1940, freq = 12)
# plot plot(ts.sim2, type = "l", col = grey(0.5)) lines(ts.sim) axis(1, time(ts.sim), lab = FALSE) On Fri, Jul 31, 2009 at 3:15 PM, Gary Lewis<gary.m.le...@gmail.com> wrote: > I could use some advice. > > I've got 2 time series. Both cover approximately the same period of > time (ie, 1940 to 2009). But one series has annual data and the other > has monthly data. One refers to university enrollment; the other to > unemployment rates. Both are currently in the same data frame. > > I'd like to use the monthly times series as a light grayscale > background for a plot of the annual time series, showing both series > as type "l" (line). Naturally with all the NA's in the annual series, > that plot disappears because points are not connected across missing > values. > > I suppose I could make both series annual, but a lot of interesting > detail would get lost this way. Or I guess I could interpolate values > in the annual series with monthly approximations, but this means 11 > out of every 12 values is an approximation. Or I suppose I could plot > each series separately and then print them with position information, > which I'm reluctant to do because panel.superpose so nicely handles > the alignment of the 2 panels. > > What I'd really like to do is plot each independently but still > superposed. Effectively this seems to mean monthly data intervals but > line connections across the NA's in the series with annual intervals. > > Any suggestions would be appreciated. Thanks. > > Gary Lewis > > ______________________________________________ > R-help@r-project.org 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. > ______________________________________________ R-help@r-project.org 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.
