A data frame is a special list: > d <- data.frame( A=numeric(), B=logical(), C=character() ) > lapply(d, class) $A [1] "numeric"
$B [1] "logical" $C [1] "factor" Gabor On Tue, Jul 01, 2008 at 03:50:18PM +0200, Dong-hyun Oh wrote: > Dear UseRs, > > I would like to know the way to find classes of each column of > data.frame(). > > Thank you in advance. > > > > > ========================================================= > Dong-hyun Oh > Center of Excellence for Science and Innovation Studies > Royal Institute or Technology, Sweden > e-mail: [EMAIL PROTECTED] > cel: +46 73 563 45 22 > > ______________________________________________ > [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 > and provide commented, minimal, self-contained, reproducible code. -- Csardi Gabor <[EMAIL PROTECTED]> UNIL DGM ______________________________________________ [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 and provide commented, minimal, self-contained, reproducible code.
