[R] How to access data structure (List of List)

[Peter Dalgaard]

Gundala Viswanath wrote:
> Hi,
>
> I have this kind of output.
>
>   
>> str(nw)
>>     
> List of 3
>  $ :List of 2
>   ..$ part1: num 30.9
>   ..$ part2: num [1:78] 60.1 70.0 73.0 75.0 83.9 ...
>  $ :List of 2
>   ..$ part1: num [1:2] 30.9 60.1
>   ..$ part2: num [1:77] 70.0 73.0 75.0 83.9 93.1 ...
>  $ :List of 2
>   ..$ part1: num [1:3] 30.9 60.1 70
>   ..$ part2: num [1:76] 73.0 75.0 83.9 93.1 97.6 ...
>
> My question are:
>
> 1. What kind of data structure is it? List of List?
> 2. How can I access it's element?
>
> I tried the following loop but seem to fail
>
> for (i in 1:length(nw)) {
>     print(nw[i]$part1)
> }
>
>   
Try

for (i in 1:length(nw)) {
    print(nw[[i]]$part1)
}


> Please advice.
> - Gundala Viswanath
> Jakarta - Indonesia
>
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> and provide commented, minimal, self-contained, reproducible code.
>   


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