These geom_..._label() functions able the user to plot labels/text at individual features and/or links. Users have to indicate how to label the features/links by specifying label = ... or aes(label = ...

Position of labels can be adjusted with arguments such as vjust, hjust, angle, nudge_y, etc. Also check out geom_bin_label(), geom_seq_label() or geom_feat_text() given their resemblance.

geom_gene_label(
  mapping = NULL,
  data = genes(),
  angle = 45,
  hjust = 0,
  nudge_y = 0.1,
  size = 6,
  ...
)

geom_feat_label(
  mapping = NULL,
  data = feats(),
  angle = 45,
  hjust = 0,
  nudge_y = 0.1,
  size = 6,
  ...
)

geom_link_label(
  mapping = NULL,
  data = links(),
  angle = 0,
  hjust = 0.5,
  vjust = 0.5,
  size = 4,
  repel = FALSE,
  ...
)

Arguments

mapping

Set of aesthetic mappings created by aes(). If specified and inherit.aes = TRUE (the default), it is combined with the default mapping at the top level of the plot. You must supply mapping if there is no plot mapping.

data

The data to be displayed in this layer. There are three options:

If NULL, the default, the data is inherited from the plot data as specified in the call to ggplot().

A data.frame, or other object, will override the plot data. All objects will be fortified to produce a data frame. See fortify() for which variables will be created.

A function will be called with a single argument, the plot data. The return value must be a data.frame, and will be used as the layer data. A function can be created from a formula (e.g. ~ head(.x, 10)).

angle

Defines the angle in which the text will be placed. *Note

hjust

Moves the text horizontally

nudge_y

Moves the text vertically an entire contig/sequence. (e.g. nudge_y = 1 places the text to the contig above)

size

of the label

...

Other arguments passed on to layer(). These are often aesthetics, used to set an aesthetic to a fixed value, like colour = "red" or size = 3. They may also be parameters to the paired geom/stat.

vjust

Moves the text vertically

repel

use ggrepel to avoid overlaps

Details

These labeling functions use ggplot2::geom_text() under the hood. Any changes to the aesthetics of the text can be performed in a ggplot2 manner.