2 messages · Troels Ring, Peter Dalgaard
dear friends - I have an ordered factor, ID, in a data.frame, labs, and make a table, aa <- with(labs,table(val >150,ID)) - and now the order in the table is according to the alphabetic order in ID, and not as I want it. I have tried adding [order(unique(labs$ID)] but it doesn't help. I have R 2.7.1 on WinXP. Best wishes Troels
Troels Ring - - Department of nephrology - - Aalborg Hospital 9100 Aalborg, Denmark - - +45 99326629 - - tring at gvdnet.dk
dear friends - I have an ordered factor, ID, in a data.frame, labs, and make a table, aa <- with(labs,table(val >150,ID)) - and now the order in the table is according to the alphabetic order in ID, and not as I want it. I have tried adding [order(unique(labs$ID)] but it doesn't help. I have R 2.7.1 on WinXP.
Hi Troels, I suspect that your notion of "ordered factor" differs from the technical one. Is the issue that you want ID to have the ordering of levels as the order of appearance in your data? In that case, try something like within(labs, ID <- factor(ID, levels=unique(ID))) As in:
x <- c("Crosby","Stills","Nash","Nash","Young")
ID <- factor(x)
ID
[1] Crosby Stills Nash Nash Young Levels: Crosby Nash Stills Young
ID <- factor(ID, levels=unique(ID)) ID
[1] Crosby Stills Nash Nash Young Levels: Crosby Stills Nash Young
table(ID)
ID
Crosby Stills Nash Young
1 1 2 1
O__ ---- Peter Dalgaard ?ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907