Questions tagged [cca]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1
vote
1answer
14 views

Link between CCA and PCA

I have two datasets, $X$ and $Y$. I calculate the PCA components of $X$ and also perform CCA on $X$ and $Y$. If I create a model with all the PCA components of $X$, and another model with all the CCA ...
0
votes
0answers
9 views

How do we test for heteroscedasticity in canonical correlation analysis?

In a MANOVA, you can just compare the corresponding cells of the variance covariance matrices of the IVs at each level of the DV. How can this be extended to CCA?
2
votes
1answer
16 views

Canonical correlation (matrices/vectors): where did $C = P \Upsilon Q^T$ come from? Are the singular values $\upsilon$ eigenvalues?

I am given the following description of the Canonical Correlation Matrix: Consider a random vector $\mathbf{X}$ and assume we split this into two parts $\mathbf{X}^{[1]}$ with the first $d_1$ ...
0
votes
1answer
76 views

Penalized Canonical Correlation in R with PMA Module

I am trying to use sparse canonical correlation analysis as implemented in the R PMA package. I'm finding that the correlations output by the package seem slightly inconsistent with the ones you would ...
2
votes
0answers
280 views

how to explain canonical correlation to laymen?

Given two sets of variables and the objective of finding correlations among the variables in the two sets, is there any simple examples or explanation, for a group of biologists knowing only basic ...
4
votes
2answers
262 views

How to reduce dimensions of variable space w.r.t. single response variable? CCA?

My dataset is presence/absence (or relative abundance score) of 100 species on 5000 squares, and for each square I have ~100 environmental variables (many of them strongly correlated). I want to ...
3
votes
3answers
253 views

How to recognize similar environmental variables using multivariate analysis?

I am completely new to multivariate analyses and I need an advice how to get it applied to my data and which analyses to choose for which purpose. My dataset is presence/absence (or relative ...