On Tue, Mar 5, 2013 at 3:30 PM, Matthijs Daelman <matthijs.dael...@gmail.com> wrote: > Hi > > Using the ggplot2 package, I would like to obtain a plot that contains two > time series that have data points on different dates. > > For instance, one data frame looks like: > > date1, value1 > 2010-01-05, 2921.74 > 2010-01-08, 2703.89 > 2010-01-14, 3594.21 > 2010-01-20, 3659.22 > > The other data frame looks like > > date2, value2 > 2010-01-01, 285.85 > 2010-01-02, 229.20 > 2010-01-05, 333.91 > 2010-01-06, 338.27 > 2010-01-07, 272.85 > 2010-01-08, 249.04 > 2010-01-09, 240.07 > 2010-01-10, 255.06 > 2010-01-11, 275.42 > 2010-01-12, 252.39 > > I would like to plot these two time series in one and the same plot, with > date on the X axis and value on the Y axis. > > And while you're at it: how would you proceed to get a secondary Y axis for > the second dataframe? >
Lines1 <- "date1, value1 2010-01-05, 2921.74 2010-01-08, 2703.89 2010-01-14, 3594.21 2010-01-20, 3659.22" Lines2 <- "date2, value2 2010-01-01, 285.85 2010-01-02, 229.20 2010-01-05, 333.91 2010-01-06, 338.27 2010-01-07, 272.85 2010-01-08, 249.04 2010-01-09, 240.07 2010-01-10, 255.06 2010-01-11, 275.42 2010-01-12, 252.39" library(zoo) library(ggplot2) # create two zoo time series objects z1 <- read.zoo(text = Lines1, header = TRUE, sep = ",") z2 <- read.zoo(text = Lines2, header = TRUE, sep = ",") # combine them into a single multivariate time series z <- na.approx(merge(z1, z2)) # single panel autoplot(z, facet = NULL) # or, multiple panels with different Y axes autoplot(z) + facet_free() Different left and right are generally frowned upon but if you want that anyways look at the examples in ?plot.zoo -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com ______________________________________________ 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.
