nnetCMA(CMA)
nnetCMA()所属R语言包:CMA
Feed-forward Neural Networks
前馈神经网络
译者:生物统计家园网 机器人LoveR
描述----------Description----------
This method provides access to the function nnet in the package of the same name that trains Feed-forward Neural Networks with one hidden layer.<br> For S4 method information, see nnetCMA-methods
这种方法提供访问nnet在训练前馈神经网络与一个隐藏层的同名包。S4方法信息参考的功能,看到nnetCMA方法
用法----------Usage----------
nnetCMA(X, y, f, learnind, eigengenes = FALSE, models=FALSE,...)
参数----------Arguments----------
参数:X
Gene expression data. Can be one of the following:
基因表达数据。可以是下列之一:
A matrix. Rows correspond to observations, columns to variables.
Amatrix。行对应的观察,列变量。
A data.frame, when f is not missing (s. below).
一个data.frame时f不缺少(S.下面)。
An object of class ExpressionSet.
对象类ExpressionSet。
参数:y
Class labels. Can be one of the following:
类的标签。可以是下列之一:
A numeric vector.
一个numeric向量。
A factor.
Afactor。
A character if X is an ExpressionSet that specifies the phenotype variable.
一个如果character X是一个ExpressionSet指定的表型变量。
missing, if X is a data.frame and a proper formula f is provided.
missing,X是data.frame和适当的公式f提供。
WARNING: The class labels will be re-coded to range from 0 to K-1, where K is the total number of different classes in the learning set.
警告:类标签将被重新编码范围从0K-1,K是在学习集不同类别的总数。
参数:f
A two-sided formula, if X is a data.frame. The left part correspond to class labels, the right to variables.
一个双面的公式,如果X是data.frame。左边部分对应类的标签,对变量的权利。
参数:learnind
An index vector specifying the observations that belong to the learning set. May be missing; in that case, the learning set consists of all observations and predictions are made on the learning set.
索引向量指定属于学习集的意见。可能missing;在这种情况下,学习组学习集的所有意见和预测。
参数:eigengenes
Should the training be performed be in the space of eigengenes obtained from a singular value decomposition of the Gene expression data matrix ? Default is FALSE; in this case, variable selection is necessary to reduce the number of weights that have to be optimized.
应该进行培训是从基因表达数据矩阵奇异值分解得到eigengenes的空间呢?默认是FALSE;在这种情况下,变量的选择是必要的,要优化的重量,以减少数量。
参数:models
a logical value indicating whether the model object shall be returned
一个逻辑值,该值指示是否应归还模型对象
参数:...
Further arguments passed to the function nnet from the package of the same name.<br> Important parameters are:
进一步的参数传递给函数的nnet来自同名的软件包参考的重要参数是:
"size", i.e. the number of units in the hidden layer
"size",即在隐藏层单位数目
"decay" for weight decay.
"decay"重量衰减。
值----------Value----------
An object of class cloutput.
对象类cloutput。
注意----------Note----------
作者(S)----------Author(s)----------
Martin Slawski <a href="mailto:ms@cs.uni-sb.de">ms@cs.uni-sb.de</a>
Anne-Laure Boulesteix <a href="mailto:boulesteix@ibe.med.uni-muenchen.de">boulesteix@ibe.med.uni-muenchen.de</a>
Christoph Bernau <a href="mailto:bernau@ibe.med.uni-muenchen.de">bernau@ibe.med.uni-muenchen.de</a>
参考文献----------References----------
Pattern Recognition and Neural Networks.<br>
参见----------See Also----------
compBoostCMA, dldaCMA, ElasticNetCMA, fdaCMA, flexdaCMA, gbmCMA, knnCMA, ldaCMA, LassoCMA, nnetCMA, pknnCMA, plrCMA, pls_ldaCMA, pls_lrCMA, pls_rfCMA, pnnCMA, qdaCMA, rfCMA,
compBoostCMA,dldaCMA,ElasticNetCMA,fdaCMA,flexdaCMA,gbmCMA,knnCMA,ldaCMA,LassoCMA,nnetCMA,pknnCMA,plrCMA,pls_ldaCMA,pls_lrCMA,pls_rfCMA,pnnCMA,qdaCMA ,rfCMA
举例----------Examples----------
### load Golub AML/ALL data[#负载戈卢布反洗钱/所有数据]
data(golub)
### extract class labels[#提取类标签]
golubY <- golub[,1]
### extract gene expression from first 10 genes[#提取从第10个基因的基因表达]
golubX <- as.matrix(golub[,2:11])
### select learningset[#选择learningset]
ratio <- 2/3
set.seed(111)
learnind <- sample(length(golubY), size=floor(ratio*length(golubY)))
### run nnet (not tuned)[#运行nnet(不调整)]
nnetresult <- nnetCMA(X=golubX, y=golubY, learnind=learnind, size = 3, decay = 0.01)
### show results[#显示结果]
show(nnetresult)
ftable(nnetresult)
plot(nnetresult)
### in the space of eigengenes (not tuned)[#在的空间eigengenes(不调整)]
golubXfull <- as.matrix(golubX[,-1])
nnetresult <- nnetCMA(X=golubXfull, y=golubY, learnind = learnind, eigengenes = TRUE,
size = 3, decay = 0.01)
### show results[#显示结果]
show(nnetresult)
ftable(nnetresult)
plot(nnetresult)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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