「Ordered character」の版間の差分
提供: 広島大学デジタル博物館
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== Definition == | == Definition == | ||
===Glossary of "Cladistics (2nd ed.)" by [[Kitching_Forey_Humphries_Williams_1998|Kitching et al. (1998)]]=== | ===Glossary of "Cladistics (2nd ed.)" by [[Kitching_Forey_Humphries_Williams_1998|Kitching et al. (1998)]]=== | ||
− | *A [[multistate_character|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 [[ | + | *A [[multistate_character|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|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|Wagner optimization]] uses [[ordered_character|ordered characters]]. Cf. [[unordered]]. |
== 文献(引用) == | == 文献(引用) == |
2017年1月1日 (日) 21:13時点における版
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.