search for: selind

Displaying 3 results from an estimated 3 matches for "selind".

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2007 Jan 22
0
Recursive-SVM (R-SVM)
...estInd <- SampInd[ which(!(SampInd %in% TrainInd ))] } } nTests <- nTests + length(TestInd) ## in each level, train a SVM model and record test error xTrain <- x[TrainInd, ] yTrain <- y[TrainInd] xTest <- x[TestInd,] yTest <- y[TestInd] ## index of the genes used in the SelInd <- seq(1, nGene) for( gLevel in 1:length(ladder) ) { ## record the genes selected in this ladder SelFreq[SelInd, gLevel] <- SelFreq[SelInd, gLevel] +1 ## train SVM model and test error svmres <- svm(xTrain[, SelInd], yTrain, scale=F, type="C-classification", kernel="li...
2011 Feb 21
3
ROC from R-SVM?
*Hi, *Does anyone know how can I show an *ROC curve for R-SVM*? I understand in R-SVM we are not optimizing over SVM cost parameter. Any example ROC for R-SVM code or guidance can be really useful. Thanks, Angel. [[alternative HTML version deleted]]
2008 Feb 05
0
Uninformative error msgs w/ svm.default - Error in svm.default ... y must be a vector or a factor -
...-1 Levels: -1 1 > mode(m.cl.f) [1] "numeric" the rSVM function is called as such (it is a wrapper for svm in e1071, which then calls low-level svm.default ) - > rsvm_output <- RSVM(x=svm_num_mat, y=m.cl.f, ladder=laddy, CVtype="LOO" ) Error in svm.default(xTrain[, SelInd], yTrain, scale = F, type = "C-classification", : y must be a vector or a factor. ....the 'laddy' variable just specifies a recursive parameter for the overlying rSVM procedure - here, it calls the 1st round w/ all 12340 elements, then with the highest scoring 9255 element...