Results 1 to 10 of about 2,229,496 (344)

Principal components analysis of population admixture. [PDF]

open access: yesPLoS ONE, 2012
With the availability of high-density genotype information, principal components analysis (PCA) is now routinely used to detect and quantify the genetic structure of populations in both population genetics and genetic epidemiology.
Jianzhong Ma, Christopher I Amos
doaj   +3 more sources

New Interpretation of Principal Components Analysis [PDF]

open access: yesZeszyty Naukowe Warszawskiej Wyższej Szkoły Informatyki, 2017
A new look on the principal component analysis has been presented. Firstly, a geometric interpretation of determination coefficient was shown.
Zenon Gniazdowski
doaj   +3 more sources

Robust principal component analysis? [PDF]

open access: yesJournal of the ACM, 2011
This article is about a curious phenomenon. Suppose we have a data matrix, which is the superposition of a low-rank component and a sparse component. Can we recover each component individually? We prove that under some suitable assumptions, it is possible to recover both the low-rank and the sparse components exactly
Candès, Emmanuel J.   +3 more
openaire   +3 more sources

A practical introduction to EEG Time-Frequency Principal Components Analysis (TF-PCA) [PDF]

open access: yesDevelopmental Cognitive Neuroscience, 2022
This EEG methods tutorial provides both a conceptual and practical introduction to a promising data reduction approach for time-frequency representations of EEG data: Time-Frequency Principal Components Analysis (TF-PCA).
George A. Buzzell   +3 more
doaj   +2 more sources

mbDenoise: microbiome data denoising using zero-inflated probabilistic principal components analysis [PDF]

open access: yesGenome Biology, 2022
The analysis of microbiome data has several technical challenges. In particular, count matrices contain a large proportion of zeros, some of which are biological, whereas others are technical.
Yanyan Zeng   +4 more
doaj   +2 more sources

Microglia Morphological Categorization in a Rat Model of Neuroinflammation by Hierarchical Cluster and Principal Components Analysis. [PDF]

open access: yesFront Cell Neurosci, 2017
It is known that microglia morphology and function are closely related, but only few studies have objectively described different morphological subtypes.
Fernández-Arjona MDM   +4 more
europepmc   +2 more sources

Introduction to Principal Components Analysis

open access: yesPM&R, 2014
Principal components analysis (PCA) is a powerful statistical tool that can help researchers analyze datasets with many highly related predictors. PCA is a data reduction technique— that is, it reduces a larger set of predictor variables to a smaller set with minimal loss of information.
Kristin L. Sainani
openaire   +3 more sources

A multi-dimensional functional principal components analysis of EEG data. [PDF]

open access: yesBiometrics, 2017
Hasenstab K   +6 more
europepmc   +2 more sources

Modal Principal Component Analysis [PDF]

open access: yesNeural Computation, 2020
Principal component analysis (PCA) is a widely used method for data processing, such as for dimension reduction and visualization. Standard PCA is known to be sensitive to outliers, and various robust PCA methods have been proposed. It has been shown that the robustness of many statistical methods can be improved using mode estimation instead of mean ...
Sando, Keishi, Hino, Hideitsu
openaire   +3 more sources

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