Re: [R] Variable Column Names and Lists

This worked perfectly, thank you! On Fri, Feb 27, 2015 at 10:47 AM, Duncan Murdoch wrote: > On 27/02/2015 1:18 PM, Brian Trautman wrote: > > This should be a simple question, but I am at my wits end. > > > > dt<-data.table(a=rep(1:10, 26), b=1:260, c=rep(1:2, 130)) > > > > sumvar <- 'mysum' > >

Re: [R] Variable Column Names and Lists

On 27/02/2015 1:18 PM, Brian Trautman wrote: > This should be a simple question, but I am at my wits end. > > dt<-data.table(a=rep(1:10, 26), b=1:260, c=rep(1:2, 130)) > > sumvar <- 'mysum' > bvar <- 'b' > > dt_min <- dt[, list(sumvar = sum(get(bvar))), by=list(a)] > print(dt_min) > > I want th