When i try to extract a column of data from an excel file and assign it to a variable , say x, it does assign the column of data as well as different levels. it looks something like this when i print.
[1] 6.91 5.89 7.44 8.82 80 Levels: 1.43 102.07 103.65 106.21 106.24 107.15 108.58 11.19 ... so how does this levels come into picture and what do they do. I couldnot run linear regression with x as a predictor just because of this levels. please explain. ______________________________________________ R-help@r-project.org 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.