How to create quintile of variable in R : <p>Is it possible to bin a variable in to quintile (1/5th) using R. And select only the variables that fall in the 5th bin.</p>

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<li>As of now I am using the closest option which is quartile (.75) as there is not a function to do quintile. </li>
</ul>

<p>Any suggestions please. </p>
