# ggtree: a phylogenetic tree viewer for different types of tree annotations
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The `ggtree` package extending the `ggplot2` package. It based on grammar of graphics and takes all the good parts of `ggplot2`.
`ggtree` is designed for not only viewing phylogenetic tree but also displaying annotation data in the tree.
A discussion forum can be found at <https://groups.google.com/forum/#!forum/bioc-ggtree>
## Authors ##
Guangchuang Yu and Tommy Tsan-Yuk Lam, School of Public Health, The University of Hong Kong.
## Citation ##
Please cite the following article when using `ggtree`:
```
G Yu, D Smith, H Zhu, Y Guan, TTY Lam,
ggtree: an R package for visualization and annotation of phylogenetic tree
with different types of meta-data.
Methods in Ecology and Evolution, submitted
```
## License ##
All source code is copyright, under the Artistic-2.0 License.
For more information on Artistic-2.0 License see <http://opensource.org/licenses/Artistic-2.0>
## Installation ##
To install:
* the latest released version: `biocLite("ggtree")`
* the latest development version: `devtools::install_github("GuangchuangYu/ggtree")`
## Documentation ##
To view the vignette of `ggtree` installed in your system, start `R` and enter:
```r
vignette("ggtree", package = "ggtree")
```
More documents can be found in <http://guangchuangyu.github.io/tags/ggtree>.
## Bugs/Feature requests ##
- If you have any, [let me know](https://github.com/GuangchuangYu/ggtree/issues). Thx!