Hi, On Wed, Jan 13, 2010 at 12:58 PM, Yi Du <abraham...@gmail.com> wrote: > Hi, > > > I use a vector of data to draw the histogram, but it is different from the > graph by SAS. Can you check it for me please?
How are we supposed to check something without data, pictures, etc? What do you want checking, exactly? > b is a column vector of 4332 > > hist(b,probability=T,breaks=30,col='lightblue',ylim=c(0,1)) > rug(b) > > When I used rug, I find the records are smaller than 4332. I don't know > where I did wrong. What do you mean? Is the histogram that you're getting surprising? Is the result of adding a "rug" surprising? Are you actually trying to count 4332 tick marks at the bottom of your plot? What records are smaller than 4332? Try to see if what rug returns, eg: r <- rug(b) length(r) should be as long as your `b` vector I'm not sure what you're asking, but hopefully some of the info I threw at you is helpful. Please be a bit more specific with any follow up if you still find anything confusing. -steve -- Steve Lianoglou Graduate Student: Computational Systems Biology | Memorial Sloan-Kettering Cancer Center | Weill Medical College of Cornell University Contact Info: http://cbio.mskcc.org/~lianos/contact ______________________________________________ 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.