eapply applies FUN to the named values from an environment and returns the results as a list. The user can request that all named objects are used (normally names that begin with a dot are not). The output is not sorted and no enclosing environments are searched. This is a primitive function.
eapply(env, FUN, …, all.names = FALSE, USE.NAMES = TRUE)| Parameter | Description |
|---|---|
env |
environment to be used. |
FUN |
the function to be applied, found via match.fun. In the case of functions like +, %*%, etc., the function name must be backquoted or quoted. |
… |
optional arguments to FUN. |
all.names |
a logical indicating whether to apply the function to all values. |
USE.NAMES |
logical indicating whether the resulting list should have names. |
# NOT RUN {
require(stats)
env <- new.env(hash = FALSE) # so the order is fixed
env$a <- 1:10
env$beta <- exp(-3:3)
env$logic <- c(TRUE, FALSE, FALSE, TRUE)
# what have we there?
utils::ls.str(env)
# compute the mean for each list element
eapply(env, mean)
unlist(eapply(env, mean, USE.NAMES = FALSE))
# median and quartiles for each element (making use of "..." passing):
eapply(env, quantile, probs = 1:3/4)
eapply(env, quantile)
# }