Indexing in an array with two values
<p>For same values of <code>Node.clus</code>, how can I retrieve the highest <code>Node.E</code> with its index? </p>

<p>Example: If <code>Node.clus==1</code>, there are <code>[(2,0.499773),(3,0.5) (15,0.499706)]</code>. 
i.e (Node.id,Node.E)</p>

<p>It should return <code>id = 3</code> and <code>E=0.5</code>; </p>

<p>i.e If <code>Node.clus==1</code>, 0.5 is highest and 3 is the index </p>

<p><a href="https://i.stack.imgur.com/Ji8bh.png" rel="nofollow"><img src="https://i.stack.imgur.com/Ji8bh.png" alt="Dataset"></a></p>