 Usage:  seq = pruneseq (cs)  
 
 Input:

  cs                     list of vectors: data structure which represents a binary tree 
                         and is produced by cartsplit procedure, contains vectors 
                         cs.val, cs.vec, cs.mean, cs.ssr, cs.nelem. 
                         See cartsplit for the description of cs. 
                         
 Output:

  seq                    list of vectors: consists of seq.lnumber, seq.alfa. 
                         The elements of seq are vectors with the number 
                         of elements equal to the number of trees in the 
                         sequence of pruned subtrees of the tree cs. 
                         The vector seq.lnumber contains the numbers of leaves 
                         in the sequence of the pruned subtrees. 
                         The vector seq.alfa contains the values of the complexity 
                         parameter alfa. 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
