get_nodes

Additional data that should be cbind'ed togeether with the node
data.


This function returns another function that can extract nodes from a
ggraph_layout object. As a ggraph_layout object is essentially a data.frame
of nodes it might seem useless to provide this function, but since the node
data is not necessarily available until after the <code>ggraph()</code> call it
can be beneficial to be able to add information to the node data on a
per-layer basis. Unlike <code><a rd-options="" href="/link/get_edges?package=ggraph&version=0.1.1" data-mini-rdoc="ggraph::get_edges">get_edges</a></code> the use of <code>get_nodes</code> is not
mandatory and is only required if additional data should be added to selected
node layers.


The grammar of graphics as implemented in ggplot2 is a poor fit for
graph and network visualizations due to its reliance on tabular data input.
ggraph is an extension of the ggplot2 API tailored to graph visualizations
and provides the same flexible approach to building up plots layer by layer.

Thomas Pedersen

ggraph

An Implementation of Grammar of Graphics for Graphs and Networks

get_nodes function


This function returns another function that can extract nodes from a
ggraph_layout object. As a ggraph_layout object is essentially a data.frame
of nodes it might seem useless to provide this function, but since the node
data is not necessarily available until after the <code>ggraph()</code> call it
can be beneficial to be able to add information to the node data on a
per-layer basis. Unlike <code><a rd-options='' href='get_edges'>get_edges</a></code> the use of <code>get_nodes</code> is not
mandatory and is only required if additional data should be added to selected
node layers.


get_nodes: Create a node extractor function

Description

Usage

Arguments

Value

See Also