Re: [R] assign value to multiple objects with a given ls pattern

2011-02-21 Thread Ivan Calandra
As I partially showed, I guess that the problem of assigning the value 99 to any object in the workspace can be dealt with a more precise regular expression. Maybe that would do: ls(pattern="^a[1-9]$") or ls(pattern="^a[0-9]+$") In any case, I agree that alternatives are better Ivan Le 2/21

Re: [R] assign value to multiple objects with a given ls pattern

2011-02-21 Thread Greg Snow
nces@r- > project.org] On Behalf Of Nuno Prista > Sent: Monday, February 21, 2011 9:22 AM > To: r-help@R-project.org > Subject: [R] assign value to multiple objects with a given ls pattern > > Dear R colleagues, > > This seems pretty straight forward but I have been banging m

Re: [R] assign value to multiple objects with a given ls pattern

2011-02-21 Thread Ivan Calandra
Hi, This works for me: pat <- ls(pattern="^a") ## I would anchor "a" to the beginning with "^" for safety! for (i in seq_along(pat))assign(pat[i], value=99) Or this with lapply: lapply(pat, FUN=function(x) assign(x, value=99, envir=.GlobalEnv)) See ?assign HTH, Ivan Le 2/21/2011 17:22, Nuno

Re: [R] assign value to multiple objects with a given ls pattern

2011-02-21 Thread Ista Zahn
Hi Nuno, Yes, you can do for(i in ls(pattern="a")) { assign(i, 99) } but honestly this is a bad idea. It will try to assign the value of 99 to any object in your workspace that contains an a, which sounds really scary to me. Better I think to use a list: ab.list <- list(a1=1, a2=2, a3=3, a4=4

[R] assign value to multiple objects with a given ls pattern

2011-02-21 Thread Nuno Prista
Dear R colleagues, This seems pretty straight forward but I have been banging my head on this for some time and can't seem to find a solution suppose I have something like a1<-1; a2<-2; a3<-3; a4<-4; b1<-3; b2<-4 I would like to quickly assign to objects with a certain pattern, e.g., those in