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21 votes
1 answer
22k views

Is there any required amount of variance captured by PCA in order to do later analyses?

18 votes
1 answer
3k views

What is the intuition behind exchangeable samples under the null hypothesis?

13 votes
2 answers
6k views

What is the intuition behind the variation of information (VI) metric for cluster validation?

5 votes
1 answer
2k views

Follow up of cluster analysis with membership prediction

4 votes
1 answer
4k views

How to interpret these indices/metrics for comparing partitions intuitively out of these images?

4 votes
1 answer
5k views

What is the best strategy to train and validate classification using PLS-[classifier] in caret package?

4 votes
1 answer
3k views

How to interpret this cross-validated sparse LDA figure using CARET package?

4 votes
1 answer
18k views

Understanding the output of C5.0 classification model using the CARET package

4 votes
1 answer
839 views

How to interpret this loadings statement in PCA given the example in R?

1 vote
1 answer
51 views

How to compute the left singular eigenvector matrix (U) from the output of prcomp() for PCA in R?

1 vote
1 answer
124 views

How to explain the numerical discrepancy between FactoMineR::PCA() and the svd() in their output of the U matrix?

1 vote
0 answers
125 views

Would rotation of extracted components/factors after PCA/EFA affect results of a subsequent regression analysis?

1 vote
0 answers
3k views

How to report a permutation test?

1 vote
0 answers
136 views

Which variables to retain in order to preserve the same clustering pattern?