vCoverHypergraph(hypergraph)
vCoverHypergraph()所属R语言包:hypergraph
Approximate minimum weight vertex cover in a hypergraph
一个超顶点覆盖近似最小重量
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Approximate minimum weight vertex cover in a hypergraph
一个超顶点覆盖近似最小重量
用法----------Usage----------
vCoverHypergraph(hg, vW=rep(1, numNodes(hg)))
参数----------Arguments----------
参数:hg
an instance of the Hypergraph class
Hypergraph类的一个实例
参数:vW
vertex weights
顶点权重
Details
详情----------Details----------
Hypergraph g has non-negative weights on its vertices. The minimum weight vertex cover problem is to find a subset of vertices C such that C includes at least one vertex from each hyperedge and the sum of the weights of the vertices in C is minimum. This problem is NP-hard.
超图g有非负权重,其顶点。重量最小顶点覆盖问题是要找到顶点Ç,C包括至少一个,每个hyperedge在C的顶点权重的总和顶点是最低的一个子集。这个问题是NP-hard。
We implement the greedy algorithm to approximate near-optimal solution, proposed by E. Ramadan, A. Tarafdar, A. Pothen, 2004.
我们实施的贪婪算法大致接近最佳的解决方案,由大肠杆菌斋月,Tarafdar不答,答Pothen,2004年提出的。
值----------Value----------
A list of vertices from hypergraph g.
超图的的g的顶点列表。
作者(S)----------Author(s)----------
Li Long <li.long@isb-sib.ch>
参考文献----------References----------
举例----------Examples----------
# to turn the snacoreex.gxl graph (from RBGL package) to a hypergraph[关闭snacoreex.gxl图(从RBGL包)一个超]
# this is a rough example [这是一个粗略的例子]
kc_hg_n <- c("A", "C", "B", "E", "F", "D", "G", "H", "J", "K", "I", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U")
kc_hg_e <- list(c("A", "C"), c("B", "C"), c("C", "E"), c("C", "F"), c("E", "D"), c("E", "F"), c("D", "G"), c("D", "H"), c("D", "J"), c("H", "G"), c("H", "J"), c("G", "J"), c("J", "M"), c("J", "K"), c("M", "K"), c("M", "O"), c("M", "N"), c("K", "N"), c("K", "F"), c("K", "I"), c("K", "L"), c("F", "I"), c("I", "L"), c("F", "L"), c("P", "Q"), c("Q", "R"), c("Q", "S"), c("R", "T"), c("S", "T"))
kc_hg_he <- lapply(kc_hg_e, "Hyperedge")
kc_hg <- new("Hypergraph", nodes=kc_hg_n, hyperedges=kc_hg_he)
vCoverHypergraph(kc_hg)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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