On May 13, 2011, at 10:28 AM, Woida71 wrote: > I would like to create a certain number of dataframes out of one dataframe > where each of the dataframes > is related to a factor. This should be possible with a loop or a function, > as is very clumsy to do it manually > when there are quite a lot factors. > > For example having a dataframe called "exmpl": > > Site Value > 1 12 > 1 15 > 1 18 > 1 21 > 1 12 > 1 13 > 2 15 > 2 12 > 2 58 > 2 62 > 2 22 > 2 65 > 2 29 > 3 21 > 3 55 > 3 11 > 3 98 > > I would like to create 3 dataframes, where > "exmpl_01" equals: > 1 12 > 1 15 > 1 18 > 1 21 > 1 12 > 1 13 > > "exmpl_02" equals: > 2 15 > 2 12 > 2 58 > 2 62 > 2 22 > 2 65 > 2 29 > > "exmpl_03" equals: > 3 21 > 3 55 > 3 11 > 3 98 > > Thanks for any help. > Walter
The easiest way is to create a list of data frames using: > DF Site Value 1 1 12 2 1 15 3 1 18 4 1 21 5 1 12 6 1 13 7 2 15 8 2 12 9 2 58 10 2 62 11 2 22 12 2 65 13 2 29 14 3 21 15 3 55 16 3 11 17 3 98 > split(DF, DF$Site) $`1` Site Value 1 1 12 2 1 15 3 1 18 4 1 21 5 1 12 6 1 13 $`2` Site Value 7 2 15 8 2 12 9 2 58 10 2 62 11 2 22 12 2 65 13 2 29 $`3` Site Value 14 3 21 15 3 55 16 3 11 17 3 98 See ?split for more information. HTH, Marc Schwartz ______________________________________________ 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.
