Comparison of the number of enriched terms. The plots show the number of enriched GO and KEGG terms as more datasets and PPI are introduced in the analysis of genes associated with geoclimatic features using (a) gene expressions and (b) DNA methylations. Each curve was sorted by the number of enriched terms. The blue curve shows the baseline which applies correlation between genes and the geoclimatic features in the original sample space. In the plots in (a), three interesting geoclimatic features are labeled in each curve in different shapes for comparison.