lena + pca   30

Bioconductor - pcaMethods
PDF R Script Data with outliers
PDF R Script Introduction
PDF R Script Missing value imputation
PDF Reference Manual
pca  r  statistics 
6 days ago by lena
Principal Component Analysis (PCA) - A.B. Dufour - course2.pdf
Interesting tutorial, with 3D plots that explain effects of scaling/centering. Uses dudi.pca r code: "dudi.pca deals with the variables and/or the individuals whereas princomp
and prcomp deal with the individuals only. "
pca  r  statistics 
26 days ago by lena
PCA-2016.pages - pcaTutorial.pdf
9 pages introduction with basic r-code and references
pca  statistics 
26 days ago by lena
How Machines Make Predictions: Finding Correlations in Complex Data
Not really about machine learning, explains correlation with cosine angles vectors linear algebra
pca  correlation  statistics 
5 weeks ago by lena
PCA iteratively finds directions of greatest variance; but how to find a whole subspace with greatest variance? - Cross Validated
Independent component analysis (ICA) might offer an insightful alternative. ICA provides components that are not constrained to be orthogonal with each other; this means that for some purposes ICs might be more helpful than PCs.

Looking to answer the qualitative aspect of the OP's original question: What if I know I only want two principal components in order to visualize my data in 2-dimensions ? ICs can be rather helpful as ICA tries to minimize the mutual information among the projected dat...
pca  statistics 
6 weeks ago by lena
Multivariate - ChrisBilder.com
PCA, factor analysis, cluster analysis, prediction, logistic regression, nearest neighbour. Notes and examples
regression  pca  r  statistics  tutorial 
6 weeks ago by lena
A Tutorial on Principal Component Analysis - Jonathon Shlens - 2005
Principal component analysis (PCA) is a mainstay of modern data analysis - a black box that
is widely used but poorly understood. The goal of this paper is to dispel the magic behind this
black box. This tutorial focuses on building a solid intuition for how and why principal component analysis works; furthermore, it crystallizes this knowledge by deriving from simple intuitions, the mathematics behind PCA. This tutorial does not shy away from explaining the ideas in formally, nor does it shy aw...
pca  tutorial  statistics 
6 weeks ago by lena
PCA How To2 - pca.pdf
Principal Components Analysis:
A How-To Manual for R
pca  r  statistics 
6 weeks ago by lena

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