How do I write a json array from R that has a sequence of lat and long? -

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How do I write json array from R, whose length and length is long?

I would like to type: 

  [[1,2], [3,4], [5,6]]   < P> best I can:  
  toJSON (matrix (1: 6, ncol = 2, byrow = T)) # "[[1, 2], \ n [3, 4], \ n [5, 6]] "  
 How can I work in another array (JSN type)? This is important to me, so I can write the files in a geographical format as a linetrack.   
 
 
 I usually get  fromJSON :  
  ll 
  •  - JNSN ('[[[[[[[[1,2], [3,4], [5,6]]]') str (ll) $ 1: 3 List of ... $: num [1: 2] 1 2 .. $: num [1: 2] 3 4 .. $: num [1: 2] 5 6   
     We should create a list of unintentional lists, which contains every 2 elements:  
      xx    

     




  
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