Ordered character
提供: 広島大学デジタル博物館
2017年1月1日 (日) 21:13時点におけるChubo (トーク | 投稿記録)による版 (→Glossary of "Cladistics (2nd ed.)" by Kitching et al. (1998))
ordered character
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Definition
Glossary of "Cladistics (2nd ed.)" by Kitching et al. (1998)
- A multistate character of which the order has been determined. Transformation between any two adjacent states costs the same number of steps (usually one, see direction), but transformation between two non-adjacent states costs the sum of the steps betweentheir implied adjacent states. For example, in the ordered character, 0 <-> 1 <-> 2, the transformations 0 <-> 1 and 1 <-> 2 each cost the same number of steps but the transformation 0 <-> 2 costs twice as many (i.e. transformation proceeds as if via state 1). Wagner optimization uses ordered characters. Cf. unordered.