It actually did find index -- in fact, the error message is coming from index. I forgot that in this case index is a generic which in turn is calling index.ts and that is what it can't find. How about one of these:
> library(zoo) > f <- function(x) eval(substitute(index(x), list(x = x)), + envir = as.environment("package:zoo")) > environment(f) <- NULL > x <- ts(1:4) > f(x) [1] 1 2 3 4 or > library(zoo) > f <- function(x) eval.parent(substitute(index(x))) > environment(f) <- NULL > x <- ts(1:4) > f(x) [1] 1 2 3 4 On 2/2/06, Fernando Saldanha <[EMAIL PROTECTED]> wrote: > Thanks, Gabor. I tried this without success: > > > z <- ts(1:5) > > f <- function(x) {f1 <- function() get("index", "package:zoo"); f1()(x)} > > environment(f) <- NULL > > f(z) > Error in f1()(x) : no applicable method for "index" > > I also tried this, which seemed simpler, with the same outcome: > > > z <- ts(1:5) > > f <- function(x) {f1 <- get("index", "package:zoo"); f1(x)} > > environment(f) <- NULL > > f(z) > Error in f1(x) : no applicable method for "index" > > FS > > > > On 2/2/06, Gabor Grothendieck <[EMAIL PROTECTED]> wrote: > > Try: > > > > f <- function() get("index", "package:zoo") > > > > > > On 2/2/06, Fernando Saldanha <[EMAIL PROTECTED]> wrote: > > > I declared the environment of the function myfun to be NULL as follows: > > > > > > environment(myfun) <- NULL > > > > > > Later on I called that myfun and got an error message because the > > > function index() in the zoo package was called inside myfun and was > > > not visible: > > > > > > Error in myfun(args) : couldn't find function "index" > > > > > > I tried to use zoo::index() instead of index(), but that did not work. > > > In fact, zoo::index does not work even in the command line: > > > > > > > z<-ts(1:5) > > > > z > > > Time Series: > > > Start = 1 > > > End = 5 > > > Frequency = 1 > > > [1] 1 2 3 4 5 > > > > index(z) > > > [1] 1 2 3 4 5 > > > > zoo::index(z) > > > Error in loadNamespace(name) : package 'zoo' does not have a name space > > > > > > How can I qualify index() so that it is visible inside the body of myfun? > > > > > > Thanks for any suggestions, > > > > > > FS > > > > > > ______________________________________________ > > > R-help@stat.math.ethz.ch mailing list > > > https://stat.ethz.ch/mailman/listinfo/r-help > > > PLEASE do read the posting guide! > > > http://www.R-project.org/posting-guide.html > > > > > > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html