lists similarity

Question

if i have to list of concepts and i want to find the similarity between these list how can i find how much two list similar? as an example if i have two list that describe book attribute list1(author, brand , isbn, category, amount) list2(author , price , brand)

Answer 1

The easiest way is probably to calculate the edit distance between each of the elements of the list.

Answer 2

You can use the Jaccard index to compare the similarity of two sets.

Answer 3

Perl

Use this module , for comparing two lists elements. Compare # Compare elements of two or more lists

List::Compare ;

use  Data::Dumper ; 
use lib  "specify the path ";
use List::Compare;

@Llist= ( 1,2,3,4,6)  ;
@Rlist=(101,3,4,5,20,30) ;

$lc = List::Compare->new( \@Llist, \@Rlist);

print  Dumper \$lc->get_intersection();