I'm getting the impression that you're not overly familiar with R? If so then you should really try and read some of the manuals from r-project.org. R is a very complex language and has a steep learning curve.
That being said, the command takes a 2xK array, where K is the number of observations you have, and 2 is the number of categories (in your case I picked two because your example has intervention and control). The first two lines in my example were just to create some sample data to work with. For the graph example you provided, you would create a 2x13 matrix, called dat, and then use the command barplot(dat,beside=TRUE) In terms of setting the x and y axis labels, and the tick-marks as they are defined in the figure, see the options provided by ?barplot, or type help.start() and search for barplot from there. And to Rolf: I understand the frustration with posts that are simple like this, but just because your type RTFM instead of the full sentence doesn't mean you're not swearing at strangers on the Internet. Try being a little more constrained in your responses. Hope that helps, Sam On Thu, Jun 9, 2011 at 1:38 AM, Nandini B <nandini...@hotmail.com> wrote: > Hi Sam, > This is exactly what I wanted. Could you please explain the code ? what does > 15, 0.65 and 0.25 stand for ? > > > Nandini > > > > >> Date: Wed, 8 Jun 2011 19:16:06 -0300 >> Subject: Re: [R] Histogram >> From: rhelp.st...@gmail.com >> To: nandini...@hotmail.com >> CC: r-help@r-project.org >> >> I think the command you want is barplot >> >> x = rbinom(10,15,0.65) >> y = rbinom(10,15,0.25) >> barplot(rbind(x,y),beside=TRUE) >> >> >> Sam >> >> On Wed, Jun 8, 2011 at 10:14 AM, nandini_bn <nandini...@hotmail.com> >> wrote: >> > >> > Hello , >> > I am trying to create a histogram in order to compare between two groups >> > and >> > would like it to be similar to the figure attached. How can I generate >> > this >> > using R ? >> > >> > >> > Thank you, >> > Nandini http://r.789695.n4.nabble.com/file/n3582448/5634-15977-1-PB.gif >> > >> > -- >> > View this message in context: >> > http://r.789695.n4.nabble.com/Histogram-tp3582448p3582448.html >> > Sent from the R help mailing list archive at Nabble.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. >> > > ______________________________________________ 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.
