Provide a general solution for faceted tree structure

[Yunuuuu]

The ggtree package is an excellent tool for drawing phylogenetic trees. However, a common limitation among many ggplot2 extensions for tree structures is that they typically confine a single tree to a single panel. To overcome this constraint, a practical workaround is to draw the tree lines across multiple panels twice.

In my heatmap package, ggalign, I have adopted this strategy to render dendrograms. This package is a pure ggplot2 extension and does not rely on other heatmap packages like ComplexHeatmap. The relevant script can be found in the file located at https://github.com/Yunuuuu/ggalign/blob/main/R/dendrogram.R.

By employing this solution, ggalign facilitates the creation of sophisticated heatmaps, as illustrated in the following examples:

three panels in columns

three panels in columns and two panels in rows

Y叔，我是从硕士时期（快5年了）起跟随您学习 R 语言，一直关注您的知识星球，直到关停。当时我对 R 语言的掌握还很初级，连在 ggplot 图上添加一个简单的条带都感到困难，正是的知识星球上得到了您的指点。非常感谢您当初的教导和帮助。