Hi Petr, See inline.
PIKAL Petr <petr.pi...@precheza.cz> writes: > Hi > > see inline > >> -----Original Message----- >> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Loris >> Bennett >> Sent: Monday, March 09, 2015 4:35 PM >> To: r-h...@stat.math.ethz.ch >> Subject: Re: [R] Add sum line to plot of multiple x values >> >> PIKAL Petr <petr.pi...@precheza.cz> writes: >> >> > Hi >> > >> > Not extremely clear what do you want to plot. Do you want to add a >> > line which marks total number of files each day regardless of user? >> Or >> > a total number of files regardless of date coloured by user? >> >> Sorry, I was unclear. I meant that I would like to plot the following: >> >> 1. For each user: the number of files for each date (my code does this) >> 2. The sum of files of all users for each date (this is what I still >> need) >> >> > In each case you shall search functions geom_hline or geom_abline >> > >> > http://stackoverflow.com/questions/13254441/add-a-horizontal-line-to- >> plot-and-legend-in-ggplot2 >> >> So I don't want a straight line > > but in your code is > >>> geom_line(data=d,aes(x=date,y=sum(files),group=date),colour='black') > > so you apparently want some sort of line. Yes, but see below. > anyway, if I do > > d.ag<-aggregate(d$files, list(d$date), sum) > > I can add > > p+geom_point(data=d.ag,aes(x=Group.1,y=x), size=5) > > and I get summary points. Thanks, this works. > If you want lines you can do > > p+geom_hline(data=d.ag,aes(yintercept=x, colour=Group.1)) > > or you can fiddle with geom_segment I don't want an hline, just a line joining the dots I get using geom_point. I thought something like p + geom_line(data=d.ag,aes(x=as.character(Group.1),y=x) would work. However, while I get a plot with axes labelled in the correct ranges, no line is plotted. Explicitly setting the colour with p + geom_line(data=d.ag,aes(x=as.character(Group.1),y=x),colour="red") doesn't help. What am I doing wrong? >> >> > ggplot is rather complicated but very flexible >> >> I don't mind ggplot being complicated, but I find the documentation a >> little impenetrable. > > You can find plenty of help when you just try to google on the item > searching. Actually this is what I do when the solution is not obvious > or requires some hidden instruction. This is what I normally resort to with varying degrees of success. It just seems a bit of a shame the some of the documentation for such a good piece of software does indeed appear to be rather "hidden". > Cheers > Petr > >> >> Cheers, >> >> Loris >> >> >> >> -----Original Message----- >> >> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of >> Loris >> >> Bennett >> >> Sent: Monday, March 09, 2015 2:56 PM >> >> To: r-h...@stat.math.ethz.ch >> >> Subject: [R] Add sum line to plot of multiple x values >> >> >> >> Hi, >> >> >> >> Here are my data: >> >> >> >> > d >> >> user files date >> >> 1 alice 18 2013-09-15 >> >> 2 bob 5 2013-09-15 >> >> 3 carol 21 2013-09-15 >> >> 4 alice 22 2013-09-08 >> >> 5 bob 9 2013-09-08 >> >> 6 carol 14 2013-09-08 >> >> 7 alice 26 2013-09-01 >> >> 8 bob 3 2013-09-01 >> >> 9 carol 22 2013-09-01 >> >> >> >> I would like to plot the number of files against date for all users, >> so >> >> I have: >> >> >> >> library(ggplot2) >> >> >> >> people <- c("alice","bob","carol") >> >> user <- c(rep(people,3)) >> >> files <- c(18,5,21,22,9,14,26,3,22) >> >> date <- c(rep("2013-09-15",3),rep("2013-09-08",3),rep("2013-09- >> >> 01",3)) >> >> d <- data.frame(user=user,files=files,date=date) >> >> >> >> p <- ggplot() >> >> p <- p + >> geom_line(data=d,aes(x=date,y=files,group=user,colour=user)) >> >> >> >> I would now like to add a line to show the total number of files as >> a >> >> function of date. I tried >> >> >> >> p <- p + >> >> geom_line(data=d,aes(x=date,y=sum(files),group=date),colour='black') >> >> >> >> I don't get a black line, but the plot is scaled such that I can see >> >> that sum(file) for all values of 'file', rather than those for each >> >> date, is being used. >> >> >> >> I would like to know how to do this correctly, but I would rather be >> >> able to work it out for myself. However, if I decide, say, that I >> >> don't >> >> know exactly what the 'group' argument does, how do I find it out? >> >> >> >> ?geom_line doesn't have it, although the examples there use it. >> ?ggplot >> >> doesn't mention it. ?group gives me stuff about formatting text >> >> arguments. ??group only leads me to ?ggplot2::add_group, which also >> >> does >> >> not seem to help. >> >> >> >> Am I at fault for trying to learn R in an ad hoc manner, to which >> the >> >> documentation of R does not lend itself, or am I missing something? >> >> >> >> Cheers, >> >> >> >> Loris >> >> >> >> -- >> >> This signature is currently under construction. >> >> -- This signature is currently under construction. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
