These geoms are equivalent in functionality to geom_text and geom_label and allows for simple annotation of nodes.
geom_node_text(mapping = NULL, data = NULL, position = "identity",
parse = FALSE, nudge_x = 0, nudge_y = 0, check_overlap = FALSE,
show.legend = NA, repel = FALSE, ...)geom_node_label(mapping = NULL, data = NULL, position = "identity",
parse = FALSE, nudge_x = 0, nudge_y = 0, label.padding = unit(0.25,
"lines"), label.r = unit(0.15, "lines"), label.size = 0.25,
show.legend = NA, repel = FALSE, ...)
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.
Position adjustment, either as a string, or the result of a call to a position adjustment function.
If TRUE, the labels will be parsed into expressions and
displayed as described in ?plotmath
Horizontal and vertical adjustment to nudge labels by. Useful for offsetting text from points, particularly on discrete scales.
If TRUE, text that overlaps previous text in the
same layer will not be plotted.
logical. Should this layer be included in the legends?
NA, the default, includes if any aesthetics are mapped.
FALSE never includes, and TRUE always includes.
It can also be a named logical vector to finely select the aesthetics to
display.
If TRUE, text labels will be repelled from each other
to avoid overlapping, using the GeomTextRepel geom from the
ggrepel package.
Other arguments passed on to layer(). These are
often aesthetics, used to set an aesthetic to a fixed value, like
color = "red" or size = 3. They may also be parameters
to the paired geom/stat.
Amount of padding around label. Defaults to 0.25 lines.
Radius of rounded corners. Defaults to 0.15 lines.
Size of label border, in mm.
geom_node_point understand the following aesthetics. Bold aesthetics are automatically set, but can be overridden. Italic aesthetics are required but not set by default
x
y
label
alpha
angle
colour
family
fontface
hjust
lineheight
size
vjust
Other geom_node_*: geom_node_arc_bar,
geom_node_circle,
geom_node_point,
geom_node_tile
# NOT RUN {
require(igraph)
gr <- make_graph('bull')
V(gr)$class <- sample(letters[1:3], gorder(gr), replace = TRUE)
ggraph(gr, 'igraph', algorithm = 'nicely') + geom_node_point(aes(label = class))
ggraph(gr, 'igraph', algorithm = 'nicely') + geom_node_label(aes(label = class))
# }
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