sparse stress graph layout

stress majorization for larger graphs based on a set of pivot nodes.

Usage

layout_with_sparse_stress(g, pivots, weights = NA, iter = 500)

layout_igraph_sparse_stress(g, pivots, weights = NA, iter = 500, circular)

Arguments

g

igraph object

pivots

number of pivots

weights

ignored

iter

number of iterations during stress optimization

circular

not used

Value

matrix of xy coordinates

Details

The layout_igraph_* function should not be used directly. It is only used as an argument for plotting with 'igraph'. 'ggraph' natively supports the layout.

References

Ortmann, M. and Klimenta, M. and Brandes, U. (2016). A Sparse Stress Model. https://arxiv.org/pdf/1608.08909.pdf

Author

David Schoch

Examples

if (FALSE) { # \dontrun{
library(igraph)
library(ggraph)

g <- sample_gnp(1000, 0.005)

ggraph(g, layout = "sparse_stress", pivots = 100) +
    geom_edge_link0(edge_colour = "grey66") +
    geom_node_point(shape = 21, fill = "grey25", size = 5) +
    theme_graph()
} # }