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Gottfried Helms

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pca

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6 posts edited

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52 votes cast

Answers (39)

Votes Activity Newest

13	Is PCA unstable under multicollinearity?
10	Partial Correlation Interpretation
6	“matrix is not positive definite” - even when highly correlated variables are removed
6	How to generate a large full-rank random correlation matrix with some strong correlations present?
6	How to “regress out” some variables?

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Questions (13)

Votes Activity Newest

9	What is PCA doing with autocorrelated data?
5	Estimating specific variance for items in factor analysis - how to achieve the theoretical maximum?
4	How is the proof that the Quartimax/Varimax-rotation converges?
4	Significance/confidence intervals for PCA or factor loadings - how can such be defined?
3	Significance test of whether participants have more friends of the same sex

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Tags (61)

45 pca × 23	13 r × 9
21 factor-analysis × 15	13 multicollinearity
18 correlation × 6	11 interpretation × 3
16 regression × 7	9 spss × 6
14 partial-correlation × 2	9 exploratory-data-analysis × 4

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Bookmarks (10)

Votes Activity Newest Views Added

455	Relationship between SVD and PCA. How to use SVD to perform PCA?
126	Free statistical textbooks
22	What exactly is called “principal component” in PCA?
12	Factor rotation methods (varimax, oblimin, etc.) - what do the names mean and what do the methods do?
12	What are the assumptions of factor analysis?

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	Mathematics	31,043 rep	3 gold badges54 silver badges121 bronze badges
	MathOverflow	4,659 rep	1 gold badge17 silver badges34 bronze badges
	Cross Validated	1,488 rep	14 silver badges22 bronze badges
	Buddhism	744 rep	4 silver badges13 bronze badges
	German Language	459 rep	4 silver badges9 bronze badges

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Votes cast (52)

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51	up		12	question
1	down		40	answer

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