Le 19.04.2006 15:21, Owen, Jason a écrit : > Hello, > > Suppose I simulate 20 observations from the Poisson distribution > with lambda = 4. I can summarize these values using table() and > then feed that to barplot() for a graph. > > Problem: if there are empty categories (e.g. 0) or empty categories > within the range of the data (e.g. observations for 6, 7, 9), barplot() > does not include the empty cells in the x-axis of the plot. Is there > any way to specify table() to have specific categories (in the above > example, probably 0:12) so that zeroes are included? > > Thanks, > > Jason > Hi,
What about using ?factor with its levels argument : x <- rpois(30, lambda=4) table(factor(x,levels=0:12)) Romain -- visit the R Graph Gallery : http://addictedtor.free.fr/graphiques mixmod 1.7 is released : http://www-math.univ-fcomte.fr/mixmod/index.php +---------------------------------------------------------------+ | Romain FRANCOIS - http://francoisromain.free.fr | | Doctorant INRIA Futurs / EDF | +---------------------------------------------------------------+ ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
