A Gradient Boosting Algorithm for Survival Analysis via Direct Optimization of Concordance Index
Figure 1
Predictive performance I of GBM methods on the breast cancer dataset. The box plots show the predictive concordance indices of “gbmsci” and “gbmcox” in 50 random experiments without subsampling, using the five feature representations explained in Table 1. In each box plot, the central red line indicates the median C-index; the blue box is the area; the black whiskers reach the upper and lower extremes not including outliers; the red “+” symbols represent the outliers.
