Muscularis
发表于 2025-3-26 23:50:36
Propagation and Radiation of Sound,ith their scale invariance principle. Instead, geometric mean (center) and variation matrix, containing the variances of all pairwise logratios, are considered. The scale invariance of compositions has also serious implications for graphical visualization. Univariate plotting of single parts is no l
Diluge
发表于 2025-3-27 02:36:41
Fundamentals of Room Acoustics,eral. Particularly, due to the lack of scale invariance, the known Dirichlet distribution is no longer the “must” as the underlying distribution of compositions. It is rather preferred to make use of the concept of normal distribution on the simplex, because the appropriateness of the distribution c
咆哮
发表于 2025-3-27 05:48:43
Yijun Yu,Arosha Bandara,Bashar Nuseibeheve highly homogeneous clusters, i.e. the observations (or compositional parts—in Q-mode clustering) within a cluster should be very similar to each other. On the other hand, different clusters should be dissimilar, because otherwise they should have been merged into one cluster. With cluster analys
公社
发表于 2025-3-27 12:29:59
Marco Pacchione,Elke Hombergsmeiereduce dimensionality of the input data set by constructing new coordinates, called principal components, that seek for the highest possible explained variability. They can be derived by either using a singular value decomposition of the data matrix, or by an eigenvalue decomposition of the covarianc
小步走路
发表于 2025-3-27 13:44:37
Marco Pacchione,Elke Hombergsmeierf compositional data, it might be particularly misleading to compute correlation coefficients for the original data: due to scale invariance of the compositions, any correlation values could be obtained, depending on the representation of the compositional data in the respective equivalence classes.
Acetaldehyde
发表于 2025-3-27 20:46:56
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Tracheotomy
发表于 2025-3-27 23:53:39
https://doi.org/10.1007/978-3-319-91683-5onal case, the proper choice of logratio coordinates matters, both due to the interpretation of the regression parameters and because of the properties of the regression models. And again, orthonormal coordinates, particularly in their pivot version, are preferable. Moreover, in case of regression w
巫婆
发表于 2025-3-28 03:40:35
Ahmad Faiz Zubair,Mohd Salman Abu Mansorhods to be used for their statistical processing. This situation frequently occurs with chemometric data, particularly when dealing with observations from “omics”-fields (genomics, proteomics, or metabolomics). In principle, all methods that are popular in the context of high-dimensional data, like
PALSY
发表于 2025-3-28 07:36:31
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善于
发表于 2025-3-28 12:25:10
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