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,
...
)
Gene labels are added as a text layer/component to the plot.
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.
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)).
Defines the angle in which the text will be placed. *Note
Moves the text horizontally
Moves the text vertically an entire contig/sequence.
(e.g. nudge_y = 1 places the text to the contig above)
of the label
Other arguments passed on to layer()'s params argument. These
arguments broadly fall into one of 4 categories below. Notably, further
arguments to the position argument, or aesthetics that are required
can not be passed through .... Unknown arguments that are not part
of the 4 categories below are ignored.
Static aesthetics that are not mapped to a scale, but are at a fixed
value and apply to the layer as a whole. For example, colour = "red"
or linewidth = 3. The geom's documentation has an Aesthetics
section that lists the available options. The 'required' aesthetics
cannot be passed on to the params. Please note that while passing
unmapped aesthetics as vectors is technically possible, the order and
required length is not guaranteed to be parallel to the input data.
When constructing a layer using
a stat_*() function, the ... argument can be used to pass on
parameters to the geom part of the layer. An example of this is
stat_density(geom = "area", outline.type = "both"). The geom's
documentation lists which parameters it can accept.
Inversely, when constructing a layer using a
geom_*() function, the ... argument can be used to pass on parameters
to the stat part of the layer. An example of this is
geom_area(stat = "density", adjust = 0.5). The stat's documentation
lists which parameters it can accept.
The key_glyph argument of layer() may also be passed on through
.... This can be one of the functions described as
key glyphs, to change the display of the layer in the legend.
Moves the text vertically
use ggrepel to avoid overlaps
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.