Conductance_Calculation(SamSPECTRAL)
Conductance_Calculation()所属R语言包：SamSPECTRAL
Computes the conductance between communities.
计算电导社区之间。
译者：生物统计家园网 机器人LoveR
描述----------Description----------
For each two communities, the conductance between their members is summed up and the result is returned as the conductance between the two communities.
每两个社区，其成员之间的电导总结和结果返回两族之间的电导。
用法----------Usage----------
Conductance_Calculation(full, normal.sigma, space.length, society, precision, talk=TRUE, beta=4)
参数----------Arguments----------
参数：full
The matrix containing the coordinates of all data points.
矩阵包含的所有数据点的坐标。
参数：normal.sigma
The scaling parameter, the larger it is the algorithm will find smaller clusters.
缩放参数，较大的是算法会发现较小的簇。
参数：space.length
An estimate for the length of a cube that is assumed to contain all data points.
假设一个包含所有数据点的立方体的长度估计。
参数：society
The list of communities.
社区名单。
参数：precision
Determines the precision of computations. Setting it to 6 will work and increasing it does not improve results.
决定了计算精度。它设置为6，工作和增加不改善的结果。
参数：talk
A boolean flag with default value TRUE. Setting it to FALSE will keep running the procedure quite with no messages.
一个布尔标志使用默认值true。设置为false，将继续运行程序相当没有消息。
参数：beta
A parameter with default value 4 which must NOT be changed except for huge samples with more than 100,000 data points or for developmental purposes. Setting beta to zero will reduce computational time by applying the following approximation to the conductance calculation step. For each two community, the conductance will be the conductance between their representatives times their sizes.
除了巨大的样品10多万个数据点，或为发展目的，绝不能改变的参数与默认值4。测试设置到零，将采用以下近似的电导计算步骤，减少计算时间。对于每两个社区，电导将是他们的代表之间的电导倍大小。
值----------Value----------
Returns a matrix in which each entry is the conductance between two communities.
返回一个矩阵中的每个条目是两族之间的电导。
作者（S）----------Author(s)----------
Parisa Shooshtari and Habil Zare
参考文献----------References----------
<h3>See Also</h3> <code>SamSPECTRAL</code>
举例----------Examples----------
## Not run: [＃无法运行：]
library(SamSPECTRAL)
# Reading data file which has been transformed using log transform[读取数据文件已使用log变换转化]
data(small_data)
full <- small
# Parameters:[参数：]
m <- 3000; ns <- 200; sl <- 3; cwt <-1; precision <- 6
# Sample the data and build the communities[样本数据，并建立社区]
society <- Building_Communities(full=full,m=m, space.length=sl, community.weakness.threshold=cwt)
# Compute conductance between communities[计算社区之间的电导]
conductance <- Conductance_Calculation(full=full, normal.sigma=ns, space.length=sl, society=society, precision=precision)
## End(Not run)[＃结束（不运行）]
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
注1：为了方便大家学习，本文档为生物统计家园网机器人LoveR翻译而成，仅供个人R语言学习参考使用，生物统计家园保留版权。
注2：由于是机器人自动翻译，难免有不准确之处，使用时仔细对照中、英文内容进行反复理解，可以帮助R语言的学习。
注3：如遇到不准确之处，请在本贴的后面进行回帖，我们会逐渐进行修订。
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发表于 2012-2-26 13:50:19
