I'm running a PCA with two species (one fossil and one extant) divided into multiple geographic groups.
The program I'm using is called PAST (PAlaeontological STatistics).
Anyhow, I'm a little confused about within-group and between-group PCAs and how they differ from a PCA...
Hey, I am new to this forum and would like to say thanks in advance to anyone who replies to this message. I have tried thoroughly to discover the solution myself over the last couple of days and have become confused. :confused: (edit: think this post may be in the wrong section of the site if...
Generally the PCA process is described as follows:
1: Get some data
2: Standardize the data
3: Calculate the covariance matrix
4: Calculate the eigenvectors and eigenvalues of the covariance matrix
5: Choosing components and forming a feature vector
6: Deriving the new...
I have a problem with PCA in SPSS, more specifically with results from R-matrix and significance of all variable correlations. I found that there is always non-significant correlation between some variables which I have used in PCA.
My question is if I should remove such...