Using This Tool
In this interactive graph, the relationship between nutrients(blue) and crops(red) is represented with undirected, weighted edges. Each edge weight represents the percent contribution each crop gives to a nutrient. For example, Iron may be provided equally by three crops. Their thicknesses will all be equally one third of the maximum width. The opacity or visibility of each link is also influenced by its strength. The Density of a graph is defined by the number of links, divided by the total amount possible. In a bipartite graph, this is equal to (|Crops| * |Nutrients|)1. Use the drop-down selections to change the country, food source, and year displayed. Or, use the "Highlight" dropdown to select a nutrient or crop specifically. You can zoom into the graph and drag nodes around, or click on a node to see its connections. Finally, try the bottom toggle to change graph views.
Bipartite graphs align two distinct categories to separate sides. Beacuse no link can exist between two crops or two nutrients, this classic view makes the comparison between two groups simple.
Force-Directed graphs use the weight of each edge as the 'force' between two nodes. As they are free to move, clustering naturally occurs in this view with more connected nodes usually appearing closer to the center.
1|X| = Cardinality, or amount of items in of X
Crops
0
Links
0
Density
0.00%
Avg. Weight
0.0000%
Production_kg
Keystone Crops
These crops are deemed to be significant to a country's food system as they are the largest contributor to one or more nutrients. Each nutrient has some amount of links with widths equal to that crop's percent contribution to providing said nutrient. It is helpful to note that in many cases, crops may contribute significantly to far fewer nutrients than others.* LCt is defined as the Largest Contributor to n nutrients. The summation of all LCt's below should equal to 25 - |Unused Nutrients|. Thus, Avg. LCt Weight is the contribution each crop makes on average to nutrients where it is the largest contributor. This is compared to the Average Weight of this crop to all of its connected nutrients, regardless of its contributive rank.