Jaccard index: Difference between revisions
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+---++---+-----+-----+-----+-----+-----+
</pre>
=={{header|J}}==
<syntaxhighlight lang="j">jaccard=. +&# (] %&x: -) [ -&# -.
a=. $~ 0
b=. 1 2 3 4 5
c=. 1 3 5 7 9
d=. 2 4 6 8 10
e=. 2 3 5 7
f=. , 8
jaccard&.>/~ a ; b ; c ; d ; e ; f</syntaxhighlight>
{{out}}
<pre>┌─┬───┬───┬───┬───┬───┐
│0│0 │0 │0 │0 │0 │
├─┼───┼───┼───┼───┼───┤
│0│1 │3r7│1r4│1r2│0 │
├─┼───┼───┼───┼───┼───┤
│0│3r7│1 │0 │1r2│0 │
├─┼───┼───┼───┼───┼───┤
│0│1r4│0 │1 │1r8│1r5│
├─┼───┼───┼───┼───┼───┤
│0│1r2│1r2│1r8│1 │0 │
├─┼───┼───┼───┼───┼───┤
│0│0 │0 │1r5│0 │1 │
└─┴───┴───┴───┴───┴───┘</pre>
=={{header|jq}}==
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