[R] ggplot/time series with indicators question

[Chuck White]

Thanks Dennis. That is *exactly* what I am looking for.

Two questions:
1. how can I get the markers to be filled? I see that geom_point has a property called fill which is the name of a color. Is there a way to get the color names from p? I tried to set fill to TRUE hoping it would infer from border color but that did not work!
2. can somebody please point me to a resource/link which talks about setting the axes tick marks? In the real application I have 104 data points which I would like identified in 4-week increments.

Thanks again.

---- Dennis Murphy <djmuser at gmail.com> wrote: 
> Hi:
> 
> Try this:
> 
> Your ind.df didn't include the values, so I redefined it such that it
> contained all of
> the data in data.all plus the indicators you set up in ind.df.
> 
> ind.df <- cbind(data.all[,1:3],ind.df)
> 
> # Using this ind.df as the data frame, set up the indicators so that all you
> # need to do is call geom_point on each indicator, with its desired plotting
> 
> # character (pch), on top of the base plot p:
> 
> p <- ggplot(ind.df, aes(x=week, y=value, group=id, colour=id)) +
> geom_line(size=1.05)
> p + geom_point(aes(x = week, y = ind1, colour = id), shape = 1, size = 3) +
>     geom_point(aes(x = week, y = ind2, colour = id), shape = 2, size = 3) +
>     geom_point(aes(x = week, y = ind3, colour = id), shape = 22, size = 3) +
>     geom_point(aes(x = week, y = ind6, colour = id), shape = 4, size = 3)
> 
> 
> Since this question properly belongs on the ggplot2 list, it is being cc'ed
> there as well.
> 
> HTH,
> Dennis
> 
> On Mon, Feb 1, 2010 at 6:06 PM, Chuck White <chuckwhite8 at charter.net> wrote:
> 
> > Hello, I am trying to plot time-series data with certain weeks highlighted
> > using symbols.
> >
> > require(ggplot2)
> >
> > #plotting time series data
> > timescale <- seq(as.Date("01/01/09","%m/%d/%y"), length.out=12, by=7)
> > data.all <- data.frame(
> >    id = c(rep('111',12),rep('222',12),rep('333',12)),
> >    week=c(timescale,timescale,timescale),
> >    value=c(rnorm(12,15,3),rnorm(12,30,5),rnorm(12,20,5))
> > )
> >
> > p <- ggplot(data.all, aes(x=week, y=value, group=id, colour=id)) +
> > geom_line(size=1.05)
> >
> > #adding indicators on each line
> > data.all$ind <-
> > c(rep("",4),rep("2",2),rep("",4),rep("3",2),rep("",2),rep("2",4),rep("",3),rep("6",3),rep("",8),rep("1",4))
> >
> > ind.uniq = setdiff(unique(data.all$ind),c(""))
> > names(ind.uniq) <- paste("ind", ind.uniq, sep="")
> > ind.df <- data.frame(lapply(ind.uniq, function(x) ifelse(data.all$ind==x,
> > data.all$value, NA)))
> > ind.df <- cbind(data.all[,c("id","week")],ind.df)
> >
> > How can I add markers based on the data in ind.df? In the above example,
> > there are four indicators 1,2,3 and 6.  I'd like to be able to show each
> > using a different shape (circle, triangle, square, cross). Additionally, I'd
> > like to use the same colors for the markers as the lines they are plotted
> > on.
> >
> > Thanks.
> >
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> >