Re: [R] Data manipulation with aggregate

ll=TRUE)   Name length type 1    a    1.5    x 2    b    3.5 A.K. - Original Message - From: Filoche To: r-help@r-project.org Cc: Sent: Tuesday, July 3, 2012 12:04 PM Subject: [R] Data manipulation with aggregate Hi everyone. I have these data : myData = data.frame(Name =

Re: [R] Data manipulation with aggregate

try this: > myData = data.frame(Name = c('a', 'a', 'b', 'b'), length = c(1,2,3,4), type + = c('x','x','y','z')) > > result <- do.call(rbind, lapply(split(myData, myData$Name), function(.name){ + data.frame(Name = .name$Name[1L] + , length = mean(.name$length) + , type = if (all(.name$type[1L] == .

[R] Data manipulation with aggregate

Hi everyone. I have these data : myData = data.frame(Name = c('a', 'a', 'b', 'b'), length = c(1,2,3,4), type = c('x','x','y','z')) which gives me: Name length type 1a 1x 2a 2x 3b 3y 4b 4 z I would group (mean) this DF using 'Name' as grouping