ggraph (version 0.1.1)

geom_node_text: Annotate nodes with text

Description

These geoms are equivalent in functionality to geom_text and geom_label and allows for simple annotation of nodes.

Usage

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, ...)

Arguments

mapping

Set of aesthetic mappings created by aes or aes_. By default x and y are mapped to x and y in the node data.

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.

position

Position adjustment, either as a string, or the result of a call to a position adjustment function.

parse

If TRUE, the labels will be parsed into expressions and displayed as described in ?plotmath

nudge_x, nudge_y

Horizontal and vertical adjustment to nudge labels by. Useful for offsetting text from points, particularly on discrete scales.

check_overlap

If TRUE, text that overlaps previous text in the same layer will not be plotted.

show.legend

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.

repel

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.

label.padding

Amount of padding around label. Defaults to 0.25 lines.

label.r

Radius of rounded corners. Defaults to 0.15 lines.

label.size

Size of label border, in mm.

Aesthetics

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

See Also

Other geom_node_*: geom_node_arc_bar, geom_node_circle, geom_node_point, geom_node_tile

Examples

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))