4.8 仅连接注释

作者：Zuguang Gu8
翻译：Steven Shen
原文：Concatenate only the annotations

The concatenation can be done without any heatmap.

rowAnnotation(foo = 1:12) +
    rowAnnotation(bar = anno_barplot(1:12, width = unit(4, "cm")))

If there is only one HeatmapAnnotation object, you must concatenated with NULL.

rowAnnotation(bar = anno_barplot(1:12, width = unit(4, "cm"))) + NULL

The annotation list is actually also a HeatmapList object.

anno_list = rowAnnotation(foo = 1:12) +
    rowAnnotation(bar = anno_barplot(1:12, width = unit(4, "cm")))
class(anno_list)


## [1] "HeatmapList"
## attr(,"package")
## [1] "ComplexHeatmap"

Thus, you can use some functionalities of the draw() function for the annotation list, such as row splitting.

draw(anno_list, row_split = rep(c("A", "B"), each = 6))

In Section 10.2, we will show how to use a list of annotations to visualize multiple summary statistics.