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21 kwi 2021 · GSDA then computes a phenotype distance matrix (Fig. 1b) and an expression distance matrix for the genes in the gene-set (Fig. 1c). Each entry of the distance matrix gives the distance between a pair of subjects in terms of the variable for which the distance was computed.
17 mar 2021 · A distance matrix has to satisfy additional properties in order to correspond to some weighted tree. In fact, there are two models that assume special constraints on the distance matrix: Ultrametric: For all triplets (a, b, c) of leaves, two pairs among them have equal distance, and the third distance is smaller; i.e. the triplet can be ...
24 maj 2017 · In this simulation study, we analyze the behavior of different genetic distances in Island (null hypothesis) and stepping stone models displaying varying neighborhood sizes.
11 gru 2023 · --ibs-test and --groupdist consider three subsets of the distance matrix: pairs of affected samples, affected-unaffected pairs, and pairs of unaffected samples.
1 kwi 2016 · Genetic distance is the degree of gene difference (genomic difference) between species or populations that is measured by some numerical method. Genetic distance measures have already been...
1 mar 2002 · The primary use for plots of (genetic) isolation by (geographic) distance is to assess whether more distant population pairs are more different genetically. However, these plots can also be used to test the validity of simpler models of population structure (e.g., island or hierarchical island models).
1 sie 2006 · The model predicts a positive relationship between genetic differentiation and the resistance distance, a distance metric that exploits precise relationships between random walk times and effective resistances in electronic networks.
