Fig. 5: Reference and personal food similarity networks.
From: Nutritional redundancy in the human diet and its application in phenotype association studies
a The reference food similarity network (FSN) was projected from the reference food-nutrient network constructed from the Harvard food composition database used in the NHS. The similarity between food-\(i\) and food-\(j\) was calculated using the unweighted Jaccard similarity index \({s}_{{ij}}\). Only links with \({s}_{{ij}}\ge 0.85\) were kept in the visualization. The color of each node represents the food group it belongs to. b The personal FSN constructed for a particular NHS participant (ID #12137) using her FFQ data collected in 1984. This network is a subgraph of the reference FSN shown in (a), thus those nodes and links in global network but do not appear in the subnetwork are shown in white. c The personal FSN of the same NHS participant constructed using her FFQ data collected in 2010. In (b, c), node sizes are proportional to the relative abundance of the food items and edge widths are proportional to the food similarities.
