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Gottfried Helms

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Votes Activity Newest Views Added

455

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306k

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Relationship between SVD and PCA. How to use SVD to perform PCA?

pca dimensionality-reduction matrix svd

Aug 20 '18 at 19:03 Community♦ 1

126

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28

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41k

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Free statistical textbooks

teaching references

Nov 27 at 20:00 chl 49.6k

22

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1

answer

7k

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What exactly is called “principal component” in PCA?

pca terminology definition

Jul 22 '16 at 19:43 Community♦ 1

12

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2

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13k

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Factor rotation methods (varimax, oblimin, etc.) - what do the names mean and what do the methods do?

factor-analysis terminology factor-rotation

Feb 22 at 10:40 user312152 1

12

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3

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16k

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What are the assumptions of factor analysis?

correlation factor-analysis assumptions dimensionality-reduction

Aug 5 '17 at 8:59 Chris Kelly 99

9

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6k

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What is the relationship between scale reliability measures (Cronbach's alpha etc.) and component/factor loadings?

factor-analysis reliability psychometrics cronbachs-alpha scale-construction

Aug 3 '17 at 19:05 Community♦ 1

8

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1

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Which matrix should be interpreted in factor analysis: pattern matrix or structure matrix?

pca interpretation factor-analysis rotation

Mar 26 '18 at 17:17 Alexey Gusev 1

7

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4

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8k

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Very different results of principal component analysis in SPSS and Stata after rotation

pca spss stata factor-analysis factor-rotation

Jul 11 '19 at 22:56 am313 31

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What is the value of linear dimensionality reduction in the presence of nonlinear alternatives?

pca dimensionality-reduction manifold-learning

Sep 23 '17 at 23:41 user20160 25.8k

3

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4

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“matrix is not positive definite” - even when highly correlated variables are removed

spss factor-analysis matrix

Dec 10 '19 at 4:14 Community♦ 1

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