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.
