Filtry
Analysing Pairwise Logratios Revisited
pairwise logratios are preferred by many for multivariate analysis in the geochemical practice, principally because of their simpler interpretation. However, the logratioEven though the logratio methodology provid...
Environmental sciences (social aspects to be 5.7)
- 2021 •
- Jimp •
- Odkaz
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Selective pivot logratio coordinates for partial least squares discriminant analysis modelling with applications in metabolomics
processing is through logratio analysis. In the current work, we introduce selective pivot logratio coordinates as a new type of orthonormal logratio coordinate. These logratio coordinates are constructed...
Analytical chemistry
- 2023 •
- JSC •
- Odkaz
Rok uplatnění
JSC - Článek v periodiku v databázi SCOPUS
Výsledek na webu
Logratio Approach to Distributional Modeling
., in terms of ratios (or logratios) between the different age classes. Here we present, the continuous case allows to make a link to functional data analysis. Moreover logratio transformation is a convenient tool for pract...
Statistics and probability
- 2021 •
- C •
- Odkaz
Rok uplatnění
C - Kapitola v odborné knize
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Robust factor analysis for compositional data
Factor analysis as a dimension reduction technique is widely used. Although some procedures, suitable for factor analysis with compositional data, were to handle. We present an approach based on the centred logratio (clr) t...
BA - Obecná matematika
- 2009 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Simple enough, but not simpler: reconsidering additive logratio coordinates in compositional analysis
Compositional data, multivariate observations carrying relative information, are popularly expressed in additive logratio coordinates which are easily interpretable as they use one of the components as ratioing part to produce pairwise l...
Statistics and probability
- 2023 •
- Jimp •
- Odkaz
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Interpretation of compositional regression with application to time budget analysis
of regression analysis within the logratio methodology and apply them to reveal potential analysis. As individual activities represent relative contributions to the total amount geometrical features of time budget variable...
Statistics and probability
- 2018 •
- JSC •
- Odkaz
Rok uplatnění
JSC - Článek v periodiku v databázi SCOPUS
Výsledek na webu
Interpretation of compositional regression with application to time budget analysis
of regression analysis within the logratio methodology and apply them to reveal potential analysis. As individual activities represent relative contributions to the total amount geometrical features of time budget variable...
Statistics and probability
- 2018 •
- JSC •
- Odkaz
Rok uplatnění
JSC - Článek v periodiku v databázi SCOPUS
Výsledek na webu
Principal component analysis for compositional data with outliers
analysis (PCA). Here we propose to use the isometric logratio transformation (ilr transformation of the data. The centred logratio transformation (clr) is often used to open closed data. However the transformed data do not...
BA - Obecná matematika
- 2009 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Regression imputation with Q-mode clustering for rounded zero replacement in high-dimensional compositional data
The logratio methodology is not applicable when rounded zeros occur in compositional data. There are many methods to deal with rounded zeros. However, some methods regression with these groups using centered logratio coordinates.We ...
Statistics and probability
- 2018 •
- Jimp •
- Odkaz
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Preprocessing of centred logratio transformed density functions using smoothing splines
With large-scale database systems, statistical analysis of data, occurring analysis. Nevertheless, due to specific properties of density functions, their proper analysis. Namely, the usual L2 metric does not fully accounts ...
BA - Obecná matematika
- 2016 •
- Jx •
- Odkaz
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Výsledek na webu
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