Imputation of rounded zeros for high-dimensional compositional data
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F16%3A33159172" target="_blank" >RIV/61989592:15310/16:33159172 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15110/16:33159172
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0169743916300958" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0169743916300958</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.chemolab.2016.04.011" target="_blank" >10.1016/j.chemolab.2016.04.011</a>
Alternative languages
Result language
angličtina
Original language name
Imputation of rounded zeros for high-dimensional compositional data
Original language description
High-dimensional compositional data, multivariate observations carrying relative information, frequently contain values below a detection limit (rounded zeros). We introduce new model-based procedures for replacing these values with reasonable numbers, so that the completed data set is ready for use with statistical analysis methods that rely on complete data, such as regression or classification with high-dimensional explanatory variables. The procedures respect the geometry of compositional data and can be considered as alternatives to existing methods. Simulations show that especially in high-dimensions, the proposed methods outperform existing methods. Moreover, even for a large number of rounded zeros, the new methods lead to an improved quality of the data, which is important for further analyses. The usefulness of the procedure is demonstrated using a data example from metabolomics.
Czech name
—
Czech description
—
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BA - General mathematics
OECD FORD branch
—
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemometrics and Intelligent Laboratory Systems
ISSN
0169-7439
e-ISSN
—
Volume of the periodical
155
Issue of the periodical within the volume
JUL
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
183-190
UT code for WoS article
000377732400020
EID of the result in the Scopus database
—