Ask for histogram
If I do
b <- rnorm(4332)
hist(b,probability=T,breaks=30,col='lightblue',ylim=c(0,1))
rug(b)
The plot looks entirely reasonable.
As far as being different from SAS, perhaps SAS and R use different
breakpoints, that is, different boundaries between the histogram bars.
-Don
At 11:58 AM -0600 1/13/10, Yi Du 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? 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. Thanks. -- Yi Du [[alternative HTML version deleted]]
______________________________________________ R-help at 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.
-------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA 925-423-1062