deds.genExtra(DEDS)
deds.genExtra()所属R语言包：DEDS
Generating Extra Parameters for Test Statistics Functions for
生成额外的参数测试统计功能
译者：生物统计家园网 机器人LoveR
描述----------Description----------
deds.genExtra is used to pass in extra arguments for comp.stat and deds.stat.linkC, which computes various test statistics for differential expression in microarray data.
deds.genExtracomp.stat和deds.stat.linkC差表达微阵列数据，计算各种测试统计，用来传递额外的参数。
用法----------Usage----------
deds.genExtra(classlabel, tests)
参数----------Arguments----------
参数：classlabel
A vector of integers corresponding to observation (column) class labels. For k classes, the labels must be integers between 0 and k-1.
观察（列）类的标签对应的整数向量。对于k类，标签必须是0k-1之间的整数。
参数：tests
A vector of character string specifying the statistics to be used to test differential expression. The character string could be any of the followings: <br> <table summary="Rd table"> <tr> <td align="left"> test="t": </td><td align="left"> one- or two-sample t-statistics; </td> </tr> <tr> <td align="left"> test="f": </td><td align="left"> F-statistics;</td> </tr> <tr> <td align="left"> test="fc": </td><td align="left"> fold changes among classes;</td> </tr> <tr> <td align="left"> test="sam": </td><td align="left"> SAM-statistics; </td> </tr> <tr> <td align="left"> test="modt": </td><td align="left"> moderated t-statistics; </td> </tr> <tr> <td align="left"> test="modf": </td><td align="left"> moderated F-statistics; </td> </tr> <tr> <td align="left"> test="B": </td><td align="left"> B-statistics.</td> </tr> </table>
指定一个字符串矢量被用来测试的差异表达的统计数字。字符串可能有下列情形之一：参考<table summary="Rd table"> <TR> <TD ALIGN="LEFT">test="t"：</ TD> <TD对齐=“左” >一或两样本的t-统计量; </ TD> </ TR> <TR> <TD ALIGN="LEFT">test="f"：</ TD> <td ALIGN="LEFT">的F-统计; </ TD> </ TR> <TR> <TD ALIGN="LEFT">test="fc"：</ TD> <TD ALIGN="LEFT">类之间的倍; </ TD> </ TR> <TR> <td ALIGN="LEFT"> test="sam"：</ TD> <td ALIGN="LEFT"> SAM统计; </ TD> </ TR> <TR> <TD对齐= “左”>test="modt"：</ TD> <td ALIGN="LEFT">主持t-统计量; </ TD> </ TR> <TR> <td ALIGN="LEFT">test="modf" ：</ TD> <td ALIGN="LEFT">放缓F-统计; </ TD> </ TR> <TR> <TD ALIGN="LEFT">test="B"：</ TD> <TD对齐=“左”的B-统计。</ TD> </ TR> </ TABLE>
Details
详情----------Details----------
Given the names of the test statistics, deds.genExtra generates extra parameters needed to be passed in the functions comp.stat and deds.stat.linkC for the assessment of differential expression. Both functions are interfaces to C functions. deds.genExtra generates default parameters as follows: <br> If test="t" or "f", "fc", "modt", "modf", the extra parameter needed is the number of classes; <br> If test="sam", the extra parameter needed is the percentile of within-gene standard deviations that the fudge factor s_0 will be set at and the default is 0.5; <br> If test="B", the extra parameter needed is the percentage of alternative hypotheses (differential expression) and the default is set at 0.01.
鉴于测试统计的名字，deds.genExtra生成功能需要通过额外的参数comp.stat和deds.stat.linkC差异表达的评估。这两个函数是C函数的接口。 deds.genExtra生成的默认参数如下：<br>如果test="t" or "f", "fc", "modt", "modf"，所需的额外的参数，是班级数目; <br>如果test="sam"，所需的额外的参数是在百分基因蒙混因素s_0将设置为默认是0.5的标准偏差;参考，如果test="B"，所需的额外的参数，是替代假说的百分比（差异表达）和默认被设置为0.01。
值----------Value----------
A numeric vector, the length of which is determined by the length of the names of the test statistics for the argument test.
一个数值向量，其长度是确定的检验统计量的名称为参数test长度。
作者（S）----------Author(s)----------
Yuanyuan Xiao, <a href="mailto:yxiao@itsa.ucsf.edu">yxiao@itsa.ucsf.edu</a>, <br>
Jean Yee Hwa Yang, <a href="mailto:jean@biostat.ucsf.edu">jean@biostat.ucsf.edu</a>.
参见----------See Also----------
comp.stat, deds.stat.linkC
comp.stat，deds.stat.linkC
举例----------Examples----------
## two sample test[两个样品测试]
L <- rep(0:1, c(5,5))
extras <- deds.genExtra(L, c("t","sam", "B"))
## extras will be c(2, 0.5, 0.01)[＃额外的将是C（2，0.5，0.01）]
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
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发表于 2012-2-25 16:22:41
