Figure 2From: Pathway-gene identification for pancreatic cancer survival via doubly regularized Cox regression3-fold cross validation for tuning constants ( λ 1 , λ 2 ). (A) shows the 3-D plot of the log-partial likelihood function vs. (λ 1 , λ 2 ), and the optimal values are λ 1 = 0.3 and λ 2 = 0.1; (B) shows the 3-D plot of the number of selected genes with nonzero regression coefficients vs. (λ 1 , λ 2 ).Back to article page