Hi folks,
I am having trouble accessing sub-functions when the main function is
stored in an array. For example, the following test code works fine:
fcns = c(abs, sqrt)
fcns[[1]](-2)
fcns[[2]](2)
However, when I try to access sub-functions declared within list() in a
function, this only works directly. When I try to access these within an
array only the first declared sub-function is run. For example I have
the function:
agent <- function(id) {
# MANY VARIABLES DECLARED
list(
set_id = function(newid) {
id <<- newid
},
get_id = function(newid) {
return(id)
},
# LOTS MORE SUB FUNCTIONS
)
}
If I create a variable to hold this function, I can then access all the
subfunctions without problem Example:
myAgent = agent(1)
myAgent$get_id() # Works fine
However, once this function is stored in a vector, I can no longer
access the subfunctions.
agents = c(agent(1), agent(2))
agents[[1]] # This shows the set_id function only, unnamed
agents[[1]]$get_id() # Leads to error below:
Error in agents[[1]]$get_id : object of type 'closure' is not subsettable
How can I access these sub methods within the vector?
I am using R version 2.8.1
TIA for the help!
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