I suppose that you want a histogram for snow.cover and not for year. There are several ways to proceed; two are
hist(mydata$snow.cover)
and
attach(mydata) hist(snow.cover)
More generally, it's a good idea to read the introductory manual that comes with R (or a book that introduces R). See, in particular, the section on lists and data frames in the Introduction to R.
I hope that this helps, John
At 12:41 PM 2/4/2004 +0100, Philippe de Rochambeau wrote:
Hello,
how do you create a histogram with a data frame?
year snow.cover 1970 6.5 1971 12.0 1972 14.9 1973 10.0 1974 10.7 1975 7.9 ...
mydata=data.frame(year=c(1970,...),snow.cover=c(6.5,...))
hist(mydata) does not work.
Many thanks.
----------------------------------------------------- John Fox Department of Sociology McMaster University Hamilton, Ontario, Canada L8S 4M4 email: [EMAIL PROTECTED] phone: 905-525-9140x23604 web: www.socsci.mcmaster.ca/jfox
______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
