Hi, You probably have Year stored as a factor. See below. totsoc <- structure(list(Location = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L), .Label = "SOUTH", class = "factor"), Year = 1998:2007, Value = c(29L, 20L, 32L, 29L, 25L, 28L, 27L, 28L, 22L, 31L )), .Names = c("Location", "Year", "Value"), class = "data.frame", row.names = c(NA, -10L))
qplot(Year, Value, data=totsoc, geom="line")#works as expected ggplot(totsoc, aes(x=Year, y=Value)) + geom_line()#same ##convert year to a factor dat <- totsoc dat$Year <- factor(dat$Year) qplot(Year, Value, data=dat, geom="line")## this now reproduces your problem ggplot(dat, aes(x=Year, y=Value)) + geom_line() ## same ## Solutions: 1) convert year to numeric, or 2) use group=1 as shown below, or 3) convert year to date class (this always gives me problems so I don't show an example). qplot(Year, Value, data=dat, geom="line", group=1) ggplot(dat, aes(x=Year, y=Value)) + geom_line(aes(group=1)) Best, Ista On Fri, Feb 11, 2011 at 5:29 PM, <i...@mathewanalytics.com> wrote: > > > Hi Folks, > > First, the important information. > >> sessionInfo() > R version 2.12.1 (2010-12-16) > Platform: i386-pc-mingw32/i386 (32-bit) > > Second, my problem. > > I have a series of data sets comprised in the following format. > >> totsoc > Location Year Value > 1 SOUTH 1998 29 > 2 SOUTH 1999 20 > 3 SOUTH 2000 32 > 4 SOUTH 2001 29 > 5 SOUTH 2002 25 > 6 SOUTH 2003 28 > 7 SOUTH 2004 27 > 8 SOUTH 2005 28 > 9 SOUTH 2006 22 > 10 SOUTH 2007 31 > > In order to generate a time series plot in ggplot2, I ran the following > code. > > qplot(Year, Value, data=totsoc, geom="line") > > ggplot(totsoc, aes(x=Year, y=Value)) + geom_line() > > However, neither command acctually produces a plot with lines connecting > the > data points. I get a blank window with the general gray background and the > x > and y axis. The strange thing is that ggplot2 gives me the appropriate > output > when I use "bar" or "point". For example, these commands work. > > ggplot(totsoc, aes(Year, Value)) + geom_point() > > qplot(Year, Value, data=totsoc, geom="point") > > I also tried to generate some sample data, and that worked. However, > I'm not sure why these same commands aren't working on the earlier data > set. > Here is the sample data I was working with. > > df <- data.frame(one=c(3,8,5,4,2), two=c("KS","MO","KS","CA","IA"), > three=c(2001:2005)) > qplot(three, one, data=df, geom="line") > > > Can anyone please help? > > Thank You, > A. Mathew > > ______________________________________________ > 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. > -- Ista Zahn Graduate student University of Rochester Department of Clinical and Social Psychology http://yourpsyche.org ______________________________________________ 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.