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Feature gene selection. (A,B) Biomarker signature gene expression validation by support vector machine recursive feature elimination (SVM–RFE) algorithm selection. (C) Adjustment of feature selection in the minimum absolute shrinkage and selection operator model (lasso). (D) randomForest error rate versus the number of classification trees. (E) The top 20 relatively important genes. (F) Three algorithmic Venn diagram screening genes.
