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Gottfried Helms

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pca

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51 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)

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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)

44 pca × 23	13 multicollinearity
19 factor-analysis × 15	12 r × 9
18 correlation × 6	11 interpretation × 3
16 regression × 7	9 eda × 4
14 partial-correlation × 2	8 spss × 6

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Bookmarks (10)

Votes Activity Newest Views Added

418	Relationship between SVD and PCA. How to use SVD to perform PCA?
123	Free statistical textbooks
20	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?
11	What are the assumptions of factor analysis?

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	MathOverflow	4,537 rep	1 gold badge17 silver badges33 bronze badges
	Cross Validated	1,468 rep	13 silver badges21 bronze badges
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	German Language	459 rep	4 silver badges9 bronze badges

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Votes cast (51)

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50	up		11	question
1	down		40	answer

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