layout_tbl_graph_focus function

Place nodes in circles based on distance to a specific node

This layout constrains node placement to a radius relative to its distance to a given node. It then uses stress majorisation to find an optimal node distribution according to this constraint.

layout_tbl_graph_focus(
  graph,
  focus,
  weights = NULL,
  niter = 500,
  tolerance = 1e-04,
  group = NULL,
  shrink = 10,
  circular = TRUE
)

Arguments

• graph: a tbl_graph object
• focus: An expression evaluating to a selected node. Can either be a single integer or a logical vector with a single TRUE element.
• weights: An expression evaluated on the edge data to provide edge weights for the layout. Currently ignored for the sparse version
• niter: number of iterations during stress optimization
• tolerance: stopping criterion for stress optimization
• group: An expression evaluating to a grouping of the nodes. If given the layout will keep grouped nodes within an angle range of the origin
• shrink: shrink the reserved angle range for a group to increase the gaps between groups
• circular: ignored

Returns

A data.frame with the columns x, y, circular, distance as well as any information stored as node variables in the tbl_graph object.

References

Brandes, U., & Pich, C. (2011). More flexible radial layout. Journal of Graph Algorithms and Applications, 15(1), 157-173.

See Also

Other layout_tbl_graph_*: layout_tbl_graph_auto(), layout_tbl_graph_backbone(), layout_tbl_graph_cactustree(), layout_tbl_graph_centrality(), layout_tbl_graph_circlepack(), layout_tbl_graph_dendrogram(), layout_tbl_graph_eigen(), layout_tbl_graph_fabric(), layout_tbl_graph_hive(), layout_tbl_graph_htree(), layout_tbl_graph_igraph(), layout_tbl_graph_linear(), layout_tbl_graph_manual(), layout_tbl_graph_matrix(), layout_tbl_graph_metro(), layout_tbl_graph_partition(), layout_tbl_graph_pmds(), layout_tbl_graph_sf(), layout_tbl_graph_stress(), layout_tbl_graph_treemap(), layout_tbl_graph_unrooted()

Author(s)

The underlying algorithm is implemented in the graphlayouts package by David Schoch