Yes. In particular: data$variable==1 & data
makes no sense (data is a data frame). A typo perhaps? Or as Richard indicated, consult references/tutorials to learn proper syntax for (vectorized) predicates. Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Mon, May 25, 2020 at 10:20 AM Richard M. Heiberger <r...@temple.edu> wrote: > I think the syntax you are looking for is > > datasubset <- data[ data$A ==1 & data$B == 1 , ] ) > > This gives the subset of your original data for variable A with value > 1 and variable B with value 1. > > > On Mon, May 25, 2020 at 12:57 PM Burgess, Jamie > <jamie.burg...@liverpool.ac.uk> wrote: > > > > Dear all, > > > > I hope this message finds you well. I am currently trying to subset my > data by two variables, so far, I have tried two different ways to stratify > participants into groups. I would like to use the ‘summary’ and ‘table’ > arguments to characterise the data of participants based on the presence of > two variables and summarise this sub-set against a third variable. > > I have used this method: > > > > dgb001<-subset(data,data$variable==1 & data,data$variable) > > > > > > However, I get the following error: “Error: cannot allocate vector of > size 16.0 Gb”. Is there another method I can try? > > > > > > Kind regards, > > > > > > Jamie Burgess > > > > PhD Student Endocrinology and Diabetes > > > > University of Liverpool > > > > Aintree University Hospital & > > > > The Walton Centre > > > > Institute of Ageing & Chronic Disease > > > > 0151 529 5936 > > > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > > 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 -- To UNSUBSCRIBE and more, see > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
