[R] request: To access a particular list

From: Muhammad Azam <mazam72_at_yahoo.com>
Date: Fri, 27 Jun 2008 00:19:34 -0700 (PDT)


Dear R community
I have a problem to access particular list. I have a code given below where there is recursive process. It is not possible to run it because there are few other functions involved inside like sv, LN, RN etc.

k=0; n=0; variable=c(); vr<-list()
func <- function(data,testdata)

    {
.
.
if(......){

                  n<<-n+1; vr[[n]] <<- variable; print(vr)
          }else
                {
                        k <<- k + 1; data1 = data; data2 = testdata; s=sv(data1)[[1]]; s1=s[1]; s2=s[2]; variable[k] <<- s1
                        data=LN(data1,s1,s2); testdata=LN(data2,s1,s2)             

                        func(data,testdata); 

                        data=RN(data1,s1,s2); testdata=RN(data2,s1,s2)

                        func(data,testdata)
                 } 
    } 
        func(m,w)

Actually i made an global array to store s1 named "variable". It contains "k" values. When it enters into "if", i made a list of variable named "vr". So it will make "n" lists. If i get the print out of "vr", i will get
[[1]]
[1] 4

[[1]]
[1] 4

[[2]]
[1] 4 4 3

[[1]]
[1] 4

[[2]]
[1] 4 4 3

[[3]]
[1] 4 4 3

[[1]]
[1] 4

[[2]]
[1] 4 4 3

[[3]]
[1] 4 4 3

[[4]]
[1] 4 4 3

But if i print(vr[[n]]), i get result like an array
[1] 4
[1] 4 4 3
[1] 4 4 3
[1] 4 4 3
I want to access a particular list vr[[n-1]], but it gives an error "Error in print(vr[[n - 1]]) : attempt to select less than one element". How can i tackle this problem to access vr[[n-1]]. Please give some suitable suggestions.

Thanks and best regards

Muhammad Azam

      
	[[alternative HTML version deleted]]

______________________________________________
R-help_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Fri 27 Jun 2008 - 07:22:46 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Sat 28 Jun 2008 - 07:31:18 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive