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What (who) is unweighted - definition
AGGLOMERATIVE HIERARCHICAL CLUSTERING METHOD
Unweighted Pair Group Method with Arithmetic mean
unweighted
¦ adjective
1. without a weight attached.
2. Statistics not weighted to reflect importance or value.
UPGMA
UPGMA (unweighted pair group method with arithmetic mean) is a simple agglomerative (bottom-up) hierarchical clustering method. The method is generally attributed to Sokal and Michener.
Glossary of graph theory
WIKIMEDIA GLOSSARY LIST ARTICLE
Weighted graph; Edge (graph theory); Strongly perfect graph; Peripheral vertex; Nonadjacent; Non-adjacent; Weights (graph theory); Direct neighbor; Theta0 Graph; Theta0 graph; Separating vertex; Hyperedge; Block (graph theory); Successor (graph theory); Predecessor (graph theory); Successor vertex; Predecessor vertex; Predecessor node; Successor node; Graph spanner; Spanning subgraph; Edge cut; Disconnecting set; Infinite graph; Unweighted graph; Knot (graph theory); List of graph theory terms; Adjacency (graph theory); Trail (graph theory); Maximum degree; Adjacent (graph theory); Interval (graph theory); Odd degree; Hyperedges; Face (graph theory); Graph theory terms; Graph theory glossary; Graph theory terminology; Graph theory jargon; Graph theory slang; Weight (graph theory); Subgraph (graph theory); Spanner (graph theory); DAG height; DAG width; Graph trail; Edge (graph); Supergraph (graph theory); Glossary of graph theory terms
This is a glossary of graph theory. Graph theory is the study of graphs, systems of nodes or vertices connected in pairs by lines or edges.
Wikipedia
UPGMA
UPGMA (unweighted pair group method with arithmetic mean) is a simple agglomerative (bottom-up) hierarchical clustering method. It also has a weighted variant, WPGMA, and they are generally attributed to Sokal and Michener.
Note that the unweighted term indicates that all distances contribute equally to each average that is computed and does not refer to the math by which it is achieved. Thus the simple averaging in WPGMA produces a weighted result and the proportional averaging in UPGMA produces an unweighted result (see the working example).
Examples of use of unweighted
1. While the survey was unweighted – the Southern Daily Echo stopped people on the city‘s streets to ask their views – a total of 1,000 people were questioned.
2. The (unweighted) national average price of dry opium at the farm gate in Afghanistan is dropping, but not significantly – it was $125 per kilo in December 2006 compared with $150 per kilo a year earlier.
3. Russia has also underperformed in relation to the other former Soviet republics, which have grown by an (unweighted) average of nearly ' percent per year over the last three years.
4. In Michigan, average tuition and fees were about $7,260 last year, up roughly 35 to 38 percent since 2002–03, according to unweighted data provided by the Presidents Council, a group representing Michigan public universities.