Alessandro Antonucci wrote: > Reading a csv file (db.csv) as: > > yes,full > no,full > no,empty > > I can use the command 'levels' to extract > the different values appearing for each > column as follows: > >> d<-read.csv("db.csv") >> levels(d[,2]) > > which returns > >> [1] "empty" "full" > > while, doing the same with a numerical csv file as: > > 1,6 > 0,6 > 0,7
R (i.e. read.csv) assumes this is numeric rather than categorical data. Hence specify the class of each variable in read.cvs' argument "colClasses". Uwe Ligges > the same instruction returns an empty output instead of 6 7 > > Any idea about that? > > Thanks in advance, > Alessandro > ______________________________________________ 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.