The detection and estimation of character weighting in classifications

Hansell, Roger I. C.; Ewing, Bland

doi:10.1016/0022-5193(73)90099-4

Cited by 7 publications

(1 citation statement)

References 6 publications

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“…Concordance with an acceptable classification. Hansell & Chant (1973 a, b) and Hansell & Ewing (1973) recommended weighting characters so as to maximize the agreement with an existing, accepted classification. Uniquely derived and uniquely evolved characters.…”

Section: (C) Character Weighting and Selectionmentioning

confidence: 99%

Character selection in relation to the numerical taxonomy of some male Diaspididae (Homoptera: Coccoidea)

Davies

Boratyński

1979

Biological Journal of the Linnean Society

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A quantitative comparison of the classifications of 24 species of male Diaspididae by principal component and principal coordinate analysis was extended to allow the comparison of classifications based on selected subsets of the 101 available characters. It was shown that subsets of 25-28 characters could be chosen numerically and used to construct classifications that resembled very closely the classitication based on the reference set of characters. The conclusions are discussed in relation to other views on character-weighting and in relation to classifications of the Diaspididae based on traditional taxonomic characters provided by the females.

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Section: (C) Character Weighting and Selectionmentioning

confidence: 99%

Character selection in relation to the numerical taxonomy of some male Diaspididae (Homoptera: Coccoidea)

Davies

Boratyński

1979

Biological Journal of the Linnean Society

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Classification of Liver Diseases by Clinical Chemical Laboratory Results and Cluster Analysis

Solberg

Skrede

Elgjo

et al. 1976

Scandinavian Journal of Clinical and Laboratory Investigation

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Estimating the reliability of evolutionary trees.

Penny

Hendy²

1986

Molecular Biology and Evolution

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Six protein sequences from the same 11 mammalian taxa were used to estimate the accuracy and reliability of phylogenetic trees using real, rather than simulated, data. A tree comparison metric was used to measure the increase in similarity of minimal trees as larger, randomly selected subsets of nucleotide positions were taken. The ratio of the observed to the expected number of incompatibilities for each nucleotide position (character) is a good predictor of the number of changes required at that position on the minimal (most-parsimonious) tree. This allows a higher weighting of nucleotide positions that have changed more slowly and should result in the minimal length tree converging to the correct tree as more sequences are obtained. An estimate was made of the smallest subset of trees that need to be considered to include the actual historical tree for a given set of data. It was concluded that it is possible to give a reasonable estimate of the reliability of the final tree, at least when several sequences are combined. With the present data, resolving the rodent-primate-lagomorph (rabbit) trichotomy is the least certain aspect of the final tree, followed then by establishing the position of dog. In our opinion, it is unreasonable to publish an evolutionary tree derived from sequence data without giving an idea of the reliability of the tree.

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The detection and estimation of character weighting in classifications

Cited by 7 publications

References 6 publications

Character selection in relation to the numerical taxonomy of some male Diaspididae (Homoptera: Coccoidea)

Character selection in relation to the numerical taxonomy of some male Diaspididae (Homoptera: Coccoidea)

Classification of Liver Diseases by Clinical Chemical Laboratory Results and Cluster Analysis

Estimating the reliability of evolutionary trees.

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