[R] variable scope

[Duncan Murdoch]

On Sat, 27 Mar 2004 07:08:09 -0800 (PST), "Fred J." <phddas at yahoo.com>
wrote :

>> The normal way would be to define builddl() within
>> getdata(), i.e.
>> 
>> getdata <- function(p){
>>   builddl <- function(q,s){
>>     fname <- c(fname,s)
>>     dl <- list( dl, q) 
>>   }
>>   fname <- NULL; dl <- list(NULL)#build the
>> sturcture
>>   dt <- read.csv(file.path(d,i),header=F)  #data
>
>the only problem with this method is that the debug
>package$mtrace will not step into the sub.fun builddl
>becuase it will treat it as one line statement. 

I haven't used the debug package much, but with the standard "debug"
function you can call "debug(builddl)" within the function, after
creating builddl, to turn on debugging.  

Duncan Murdoch