Have a look at lapply(). Something like: entries.with.nrows=lapply(data,function(x)dim(x)[1]>1)
should give you a vector with the elements of the list that you seek marked with TRUE. This vector can then be used to extract a subset from your list by: data.reduced=data[entries.with.nrows] Or similar.... HTH Jannis --- Lara Poplarski <larapoplar...@gmail.com> schrieb am Di, 17.5.2011: > Von: Lara Poplarski <larapoplar...@gmail.com> > Betreff: [R] subsetting a list of dataframes > An: r-help@r-project.org > Datum: Dienstag, 17. Mai, 2011 20:24 Uhr > Hello All, > > I have a list of dataframes, and I need to subset it by > keeping only those > dataframes in the list that meet a certain criterion. > Specifically, I need > to generate a second list which only includes those > dataframes whose number > of rows is > 1. > > Could someone suggest how to do this? I have come close to > what I need with > loops and such, but there must be a less clumsy way... > > Many thanks, > Lara > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > ______________________________________________ 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.
