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This is just a short announcement post that the R package oaqc is back on CRAN.
The package provides an efficient algorithm to calculate for a given graph the orbit-aware quad census. More precisely the frequency distribution of all induced and non-induced non-isomorphic four node subgraphs, i.e. quads, on a node and edge level; see the figure below for the relation between orbit and quad.
The package was archived because the original authors were not reachable anymore. I tracked them down and got their permission to maintain the package.
The new GitHub repository is https://github.com/schochastics/oaqc. Most importantly, the package now also has a hexsticker
Below is a short example for how to use the package.
< section id="input" class="level2">Input
The input can either be an edgelist (matrix or data.frame) or a graph Object (‘igraph’)
Despite the input format the graph should not contain loops or multi-edges and the vertex indices have to lie in range [0,n-1) with n denoting the number of vertices in the graph. Note that if the smallest index is 1 the algorithm will create an isolated vertex with index 0.
< section id="calculating-the-orbit-aware-quad-census" class="level2">Calculating the orbit-aware quad census
The following code exemplifies the use of this package.
library(oaqc)
### k4, pure R
k4 <- data.frame(
source = c(0, 0, 0, 1, 1, 2),
target = c(1, 2, 3, 2, 3, 3)
)
k4orbits <- oaqc(k4, non_ind_freq = FALSE, file = "")
k4orbits
$n_orbits_ind
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13] [,14]
[1,] 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[2,] 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[3,] 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[4,] 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[,15] [,16] [,17] [,18] [,19] [,20]
[1,] 0 0 0 0 0 1
[2,] 0 0 0 0 0 1
[3,] 0 0 0 0 0 1
[4,] 0 0 0 0 0 1
$e_orbits_ind
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13] [,14]
[1,] 0 0 0 0 0 0 0 0 0 0 0 0 0 1
[2,] 0 0 0 0 0 0 0 0 0 0 0 0 0 1
[3,] 0 0 0 0 0 0 0 0 0 0 0 0 0 1
[4,] 0 0 0 0 0 0 0 0 0 0 0 0 0 1
[5,] 0 0 0 0 0 0 0 0 0 0 0 0 0 1
[6,] 0 0 0 0 0 0 0 0 0 0 0 0 0 1
Reuse
< section class="quarto-appendix-contents" id="quarto-citation">Citation
@online{schoch2024,
author = {Schoch, David},
title = {Oaqc: {Orbit} Aware Quad Census Package Back on {CRAN}},
date = {2024-10-07},
url = {http://blog.schochastics.net/posts/2024-10-07_oaqc-back-on-cran/},
langid = {en}
}
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