### Prerequisites + [ ] Have you read [Feedback](https://guangchuangyu.github.io/ggtree/#feedback) and follow the [guide](https://guangchuangyu.github.io/2016/07/how-to-bug-author/)? * [ ] make sure your are using the latest release version * [ ] read the [documents](https://guangchuangyu.github.io/ggtree/documentation/) * [ ] google your quesion/issue ### Describe you issue * [ ] Make a reproducible example (*e.g.* [1](https://gist.github.com/talonsensei/e1fad082657054207f249ec98f0920eb)) * [ ] your code should contain comments to describe the problem (*e.g.* what expected and actually happened?) ### Ask in right place * [ ] for bugs or feature requests, post here (github issue) * [ ] for questions, please post to [google group](https://groups.google.com/forum/#!forum/bioc-ggtree)