Re: [R] take two columns from a set of lists

2013-03-11 Thread ishi soichi
the title of this thread was wrong. it's misleading sorry. ishida 2013/3/11 ishi soichi soichi...@gmail.com say I have a matrix and lists like x - matrix(c(12.1, 3.44, 0.1, 3, 12, 33.1, 1.1, 23), nrow=2) x.list - lapply(seq_len(nrow(x)), function(i) x[i,]) if I want a column of the

[R] take two columns from a set of lists

2013-03-11 Thread ishi soichi
say I have a matrix and lists like x - matrix(c(12.1, 3.44, 0.1, 3, 12, 33.1, 1.1, 23), nrow=2) x.list - lapply(seq_len(nrow(x)), function(i) x[i,]) if I want a column of the matrix x, I write x[, 2] for example. But how can I do something similar for a set of lists, x.list, above? x.list

Re: [R] take two columns from a set of lists

2013-03-11 Thread Jorge I Velez
Is the following that you are looking for? unlist(lapply(x.list, [, 2)) HTH, Jorge.- On Mon, Mar 11, 2013 at 9:52 PM, ishi soichi wrote: say I have a matrix and lists like x - matrix(c(12.1, 3.44, 0.1, 3, 12, 33.1, 1.1, 23), nrow=2) x.list - lapply(seq_len(nrow(x)), function(i) x[i,])

Re: [R] take two columns from a set of lists

2013-03-11 Thread ishi soichi
yes. thank you. ishida 2013/3/11 Jorge I Velez jorgeivanve...@gmail.com Is the following that you are looking for? unlist(lapply(x.list, [, 2)) HTH, Jorge.- On Mon, Mar 11, 2013 at 9:52 PM, ishi soichi wrote: say I have a matrix and lists like x - matrix(c(12.1, 3.44, 0.1, 3, 12,

Re: [R] take two columns from a set of lists

2013-03-11 Thread arun
You could also do: simplify2array(x.list)[2,] #[1] 0.1 3.0 A.K. - Original Message - From: Jorge I Velez jorgeivanve...@gmail.com To: ishi soichi soichi...@gmail.com Cc: r-help r-help@r-project.org Sent: Monday, March 11, 2013 6:57 AM Subject: Re: [R] take two columns from a set