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Robust biomarker identification in a two-class problem based on pairwise log-ratios
A new method, robust Pair-wise Log-Ratios (rPLR), is proposed can cope with the size effect problem, since it is based on log-ratios between the values of all pairs of variables. rPLR makes use of the variance of p...
Statistics and probability
- 2017 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
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Model-based replacement of rounded zeros in compositional data: Classical and robust approaches
The log-ratio methodology represents a powerful set of methods and techniques the underlying data are compositional in nature. An algorithm based on iterative log-ratio regressions is developed by combining a parti...
BB - Aplikovaná statistika, operační výzkum
- 2012 •
- Jx •
- Link
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Practical aspects of log-ratio coordinate representations in regression with compositional response
orthonormal coordinates and centred log-ratio coordinates can be utilized to simplify with orthonormal and centred log-ratio coordinates are presented. Further we discuss squared error (MSE) for orthonormal coordi...
BA - Obecná matematika
- 2016 •
- Jx •
- Link
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Výsledek na webu
Weighted pivot coordinates for partial least squares-based marker discovery in high-throughput compositional data
as compositional data where the relevant information is contained in the pairwise log-ratios between the components of the mixture. The (log-ratio) pivot coordinate approach facilitates the aggregation into single...
Statistics and probability
- 2021 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Cellwise outlier detection and biomarker identification in metabolomics based on pairwise log ratios
Data outliers can carry very valuable information and might be most informative for the interpretation. Nevertheless, they are often neglected. An algorithm called cellwise outlier diagnostics using robust pairwise log ratios (cell‐...
Statistics and probability
- 2020 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Analysis of Factors Influencing Time of Unemploment Using Survival Time Analysis.
Basic themes in document: censored data; Cox proportional model; hazard ratio; accelerated regression model; log-logistic distribution of survival time. 6 > @ p y ? ? !......
BB - Aplikovaná statistika, operační výzkum
- 2003 •
- D
Rok uplatnění
D - Stať ve sborníku
A new method for correlation analysis of compositional (environmental) data – a worked example
analysis, for which the data need to be appropriately log-ratio transformed. A newapproach based on the isometric log-ratio (ilr) transformation, leading to so-called strong positive correlations appear and remain...
Statistics and probability
- 2017 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Application of Log-linear Model in Analysis of Contingency Tables
. Alternative method based on Poisson log-linear model and likelihood ratio tests allows as the main effects. Log-linear model also offers tests based on deviance, equivalent to likelihood ratio tests, and tests ut...
BB - Aplikovaná statistika, operační výzkum
- 2004 •
- D
Rok uplatnění
D - Stať ve sborníku
Biological Wastes in Forest Industry
and logging operations. Identification of biological waste production points is very importantstep in their possible decreasing. It was observed biological waste cost ratio for silvicultural and logging operations. Biologi...
GK - Lesnictví
- 2006 •
- D
Rok uplatnění
D - Stať ve sborníku
Improving the Session Identification Using the Ratio of Auxiliary Pages Estimate
Data pre-processing is an important part of web log mining. This paper focuses on one of the phases of data pre-processing-on session identification. Cutoff time of the auxiliary pages ratio on calculation of cutoff time. Based on t...
Computer and information sciences
- 2016 •
- D •
- Link
Rok uplatnění
D - Stať ve sborníku
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