Highlight edges connected to a node or nodes

Usage

highlight_edges_by_node(
  g,
  node = NULL,
  highlight_color = "royalblue3",
  highlight_width = NULL,
  highlight_cex = 2,
  nonhighlight_alpha = NULL,
  ...
)

Arguments

g: igraph object
node: character node name, or integer node index.
highlight_color: character color used for highlighting, default 'royalblue'.
highlight_width: numeric default NULL, set a fixed edge width.
highlight_cex: numeric default 2, multiplies the edge width by this expansion factor.
nonhighlight_alpha: numeric default NULL, applies an optional alpha transparency to non-highlighted edges. Values must be between 0 (transparent) and 1 (opaque), where a value 0.5 is recommended when used.
...: additional arguments are ignored.

Value

igraph object after adjusting edge attributes.

Details

This function highlights edges connected to one of more nodes by applying a color, and adjusting the edge width.

Note that when edge attributes 'width' and 'color' are not yet defined in the igraph object, they will be defined and stored into the object by using default_igraph_values(). For example: default_igraph_values()$edge$width and default_igraph_values()$edge$color.

Other jam igraph functions: cnet2df(), cnet2im(), cnetplotJam(), cnetplot_internalJam(), color_edges_by_nodegroups(), color_edges_by_nodes(), color_nodes_by_nodegroups(), communities2nodegroups(), drawEllipse(), edge_bundle_bipartite(), edge_bundle_nodegroups(), enrichMapJam(), fixSetLabels(), flip_edges(), get_bipartite_nodeset(), igraph2pieGraph(), jam_igraph(), jam_plot_igraph(), label_communities(), layout_with_qfr(), layout_with_qfrf(), mem2emap(), memIM2cnet(), mem_multienrichplot(), nodegroups2communities(), rectifyPiegraph(), relayout_with_qfr(), removeIgraphBlanks(), removeIgraphSinglets(), reorderIgraphNodes(), rotate_igraph_layout(), spread_igraph_labels(), subgraph_jam(), subsetCnetIgraph(), subset_igraph_components(), sync_igraph_communities(), with_qfr()

Examples

cnet1 <- make_cnet_test(seed=1);
# highlight edges by node
cnet1h <- highlight_edges_by_node(cnet1, "CA", nonhighlight_alpha=0.5)
# plot the original
jam_igraph(cnet1)

# plot the highlighted variant
jam_igraph(cnet1h, label_dist_factor=3)


# highlight edges using nodeset
nodesets <- get_cnet_nodeset(cnet1)
cnet1hns <- highlight_edges_by_node(cnet1,
   nodesets[[grep("CA", nodesets)]],
   nonhighlight_alpha=0.5)
jam_igraph(cnet1hns, node_factor=2, label_factor=2, label_dist_factor=3,
   mark.groups=unname(nodesets[grep("CA", nodesets)]))