<p>Wait a couple of days to see if anybody protests against your new tag, and if nobody raises any concerns, then you can go ahead and put this tag on some older questions. I don't recommend hunting down <em>all</em> questions possibly related to this tag. Rather, I would suggest to find a dozen or two most prominent (most upvoted or otherwise most important) threads and tag those. This will be enough to "establish" the tag.</p>

<hr>

<p><strong>Related tags</strong></p>

<p>I don't like <a href="https://stats.stackexchange.com/questions/tagged/radial-basis" class="post-tag" title="show questions tagged &#39;radial-basis&#39;" rel="tag">radial-basis</a>×39 tag too much. </p>

<ol>
<li><p>Around half of its questions seem to be about <a href="https://stats.stackexchange.com/questions/tagged/rbf-network" class="post-tag" title="show questions tagged &#39;rbf-network&#39;" rel="tag">rbf-network</a>×21, which has its own tag. Those clearly should be retagged. </p></li>
<li><p>Most of the remaining questions seem to be about RBF kernel in the context of kernel methods in machine learning. I suggest we create <code>[rbf-kernel]</code> tag and map it as a synonym to <a href="https://stats.stackexchange.com/questions/tagged/kernel-trick" class="post-tag" title="show questions tagged &#39;kernel-trick&#39;" rel="tag">kernel-trick</a>×434. I don't think it would be useful to keep it separate.</p></li>
<li><p>After questions about RBF networks and about RBF kernel are moved out of the [radial-basis] tag, there will be almost no threads left there. If anything remains, it can be retagged with your new <a href="https://stats.stackexchange.com/questions/tagged/basis-function" class="post-tag" title="show questions tagged &#39;basis-function&#39;" rel="tag">basis-function</a> tag.</p></li>
</ol>
