multigraph (version 0.91)

stsm: Stress majorization layout

Description

A function to compute the graph coordinated system with a stress majorization layout algortihm

Usage

stsm(net, seed = seed, maxiter = 40, drp, jitter, method, ...)

Arguments

net

an array representing the network relations

seed

(mandatory) the seed of the initial layout (see details)

maxiter

(optional) the maximum number of iterations

drp

(optional) for weighted networks, drop values less than specified

jitter

(optional) jitter in the layout

method

(optional) initial distance method (default binary)

…

Additional argument items

Value

A data frame with the coordinated system with two columns representing the abscissa and the ordinate in a two-dimensional rectangular Cartesian coordinate system.

Details

This function was meant as an internal routine for graph visaulization; however, it can be used with the coord option both in multigraph and bmgraph where a random seed is stated by NULL

References

Gansner, E.R., Koren, Y., & North, S. Graph drawing by stress majorization. In Graph Drawing: 12th International Symposium, gd 2004, New York, NY, USA, September 29 - October 2, 2004, revised selected papers. Berlin Heidelberg: Springer. pp. 239-250. 2005.

See Also

multigraph, bmgraph, frcd, conc

Examples

# NOT RUN {
## Create the data: two binary relations among three elements
arr <- round( replace( array(runif(18), c(3,3,2)), array(runif(18),
       c(3,3,2))>.5, 3 ) )

## Coordinates for the stress majorization layout with random start
coord <- stsm(arr, seed = NULL)

## Plot multigraph with costumized coordenates
multigraph(arr, coord = coord)

# }