anno_empty: Empty Annotation

In zhongmicai/complexHeatmap: Make Complex Heatmaps

Description

Empty Annotation

Usage

anno_empty(which = c("column", "row"), border = TRUE, zoom = FALSE,
    width = NULL, height = NULL)

Arguments

which	Whether it is a column annotation or a row annotation?
border	Whether draw borders of the annotation region?
zoom	If it is true and when the heatmap is split, the empty annotation slices will have equal height or width, and you can see the correspondance between the annotation slices and the original heatmap slices.
width	Width of the annotation. The value should be an absolute unit. Width is not allowed to be set for column annotation.
height	Height of the annotation. The value should be an absolute unit. Height is not allowed to be set for row annotation.

Details

It creates an empty annotation and holds space, later users can add graphics by decorate_annotation. This function is useful when users have difficulty to implement AnnotationFunction object.

In following example, an empty annotation is first created and later points are added:

	m = matrix(rnorm(100), 10)
	ht = Heatmap(m, top_annotation = HeatmapAnnotation(pt = anno_empty()))
	ht = draw(ht)
	co = column_order(ht)[[1]]
	pt_value = 1:10
	decorate_annotation("pt", {
		pushViewport(viewport(xscale = c(0.5, ncol(mat)+0.5), yscale = range(pt_value)))
		grid.points(seq_len(ncol(mat)), pt_value[co], pch = 16, default.units = "native")
		grid.yaxis()
		popViewport()
	})  

And it is similar as using anno_points:

	Heatmap(m, top_annotation = HeatmapAnnotation(pt = anno_points(pt_value)))  

Value

An annotation function which can be used in HeatmapAnnotation.

See Also

https://jokergoo.github.io/ComplexHeatmap-reference/book/heatmap-annotations.html#empty-annotation

Examples

anno = anno_empty()
draw(anno, test = "anno_empty")
anno = anno_empty(border = FALSE)
draw(anno, test = "anno_empty without border")

zhongmicai/complexHeatmap documentation built on May 7, 2019, 6:11 a.m.