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(This article was first published on <strong><a href="https://guangchuangyu.github.io/2016/06/identify-method-for-ggtree"> R on Guangchuang YU</a></strong>, and kindly contributed to <a rel="nofollow" href="http://www.r-bloggers.com/">R-bloggers)</a> </div>
<p>We are happy to announce that <code>ggtree</code> supports interactive tree annotation/manipulation by implementing an <code>identify</code> method. Users can click on a node to highlight a clade, to label or rotate it <em>etc</em>.</p>
<p>Here is an example of highlighting clades using <code>geom_hilight</code> with <code>identify</code>:</p>
<div>
<iframe allowfullscreen src="https://www.youtube.com/embed/KcF8Ec38mzI"></iframe>
</div>
<p>
Here is another example of using <code>emojifont</code> to label clades.</p>
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<iframe allowfullscreen src="https://www.youtube.com/embed/SmcceRD_jxg"></iframe>
</div>
<p></p>
<p>Interactive tree manipulation, e.g. rotating clades, is also possible.</p>
<p><div>
<iframe allowfullscreen src="https://www.youtube.com/embed/lKNn4QlPO0E"></iframe>
</div>

<p>The videos are also available in youku (优酷), see <a target="_blank" href="http://v.youku.com/v_show/id_XMTYyMzgyODYyOA">http://v.youku.com/v_show/id_XMTYyMzgyODYyOA</a>, <a target="_blank" href="http://v.youku.com/v_show/id_XMTYyNDIzODA0NA">http://v.youku.com/v_show/id_XMTYyNDIzODA0NA</a> and <a target="_blank" href="http://v.youku.com/v_show/id_XMTYyMzgyODg2OA">http://v.youku.com/v_show/id_XMTYyMzgyODg2OA</a>.</p>
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<div>To <strong>leave a comment</strong> for the author, please follow the link and comment on their blog: <strong><a href="https://guangchuangyu.github.io/2016/06/identify-method-for-ggtree"> R on Guangchuang YU</a></strong>.</div>
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