Re: [R] extract argument names

a1 <- "qss(x1,lambda=100)" > parse(text=a1)[[1]][[2]] x1 This will not work for length(a) != 1, so you have to explicitly map over your list, e.g. a <- paste("qss(",paste("x",1:6,sep = "") ,", lambda =100)", sep = "") > dput( lapply(a,function(x)parse(text=x)[[1]][[2]]) ) list(x1, x2, x3, x4, x5,

Re: [R] extract argument names

one way seems to be the following: a <- paste("qss(",paste("x",1:6,sep = "") ,", lambda =100)", sep = "") all.vars(parse(text = a)) I hope it helps. Best, Dimitris roger koenker wrote: I have a vector of character strings that look like R expressions: > a <- paste("qss(",paste("x",1:6,sep

Re: [R] extract argument names

unlist(lapply(parse(text=a), function(x) deparse(x[[2]]))) seems to do the job. Patrick Burns patr...@burns-stat.com +44 (0)20 8525 0696 http://www.burns-stat.com (home of "The R Inferno" and "A Guide for the Unwilling S User") roger koenker wrote: I have a vector of character strings that lo

[R] extract argument names

I have a vector of character strings that look like R expressions: > a <- paste("qss(",paste("x",1:6,sep = "") ,", lambda =100)", sep = "") > a [1] "qss(x1, lambda =100)" "qss(x2, lambda =100)" "qss(x3, lambda =100)" [4] "qss(x4, lambda =100)" "qss(x5, lambda =100)" "qss(x6, lambda =100)" Tha