[R] Bind field of a list

Hello all I am new in R and so easy stuff are difficult... let say that I have a list test <- list(a=c("x","v"),b=c("n","m")) how can I without a loop get test$a bind with test$b (obviously in real life their would be many fields) Cheers and thanks -- View this message in context: http://n4.na

Re: [R] Bind field of a list

Hello, Thank you but I think not what I would like to get as an answer is the list ("x","v","n","m") + what you gave me could work for 2 fields but if I have 200... What I want is a vectorize way to do bindlists <- function(x){ output = c(); for (i in 1:length(x)) {

Re: [R] Bind field of a list

Bravo baptiste it works what does do.call do exactly ?? -- View this message in context: http://n4.nabble.com/Bind-field-of-a-list-tp1561676p1561745.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list htt

[R] Accessing values of a matrix

hello all, thank you for taking the time I have a matrix A that have column names (let say n columns), I want to reduce the matrix to have just a few of those column (p colums, this is trivial), but for the lines I want only the lines such that A(i,J) is part of a list (J is fixed and known) I a

Re: [R] Accessing values of a matrix

Hello Sarah, thanks for answering For example if I have the following example test <- as.data.frame(matrix(c(1,2,3,4, 11,12,13,14, "a","b","b","c"), nrow = 3, ncol=3,dimnames = list(c("r1","r2","r3","r4"),NULL)) V1 V2 V3 r1 1 11 a r2 2 12 b r3 3 13 b r4 4 14 c it is easy to select

Re: [R] Accessing values of a matrix

OKKK Thanks a lot for letting me know the subset function Cheers -- View this message in context: http://n4.nabble.com/Accessing-values-of-a-matrix-tp1561932p1564724.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.or