Fig. 3

Differentially expressed genes and feature selection of genes between high and low immune infiltration groups. a Volcano plot of differentially expressed genes: the red dots represent significantly up-regulated genes and green dots represent significantly down-regulated genes between high and low immune infiltration groups. b, c The point highlighted indicates the lowest error rate, the highest accuracy rate and the 72 corresponding genes at both points are the best signature selected by support vector machine-recursive feature elimination (SVM-RFE) algorithm. a was generated by ggplot2 (version 3.2.1); b-c were generated by E1071 package (version 1.7–4)