On Tue, 2006-08-15 at 13:10 -0400, T Mu wrote: > Hi all, > > Suppose I have a data frame myDF, col A is factor, col B is numeric, col C > is character. I can get their classes by > > > class(myDF$A) > > but is there a quick way to show what classes of all columns are? Thank you. > > Tian
Depending upon the output format you desire: > lapply(iris, class) $Sepal.Length [1] "numeric" $Sepal.Width [1] "numeric" $Petal.Length [1] "numeric" $Petal.Width [1] "numeric" $Species [1] "factor" or > sapply(iris, class) Sepal.Length Sepal.Width Petal.Length Petal.Width Species "numeric" "numeric" "numeric" "numeric" "factor" See ?lapply and ?sapply HTH, Marc Schwartz ______________________________________________ R-help@stat.math.ethz.ch 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.
