Displaying 3 results from an estimated 3 matches for "plotpc".
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plotcp
2010 May 15
2
Attempt to customise the "plotpc()" function
Dear R-list,
Among the (R-)tools, I've seen on the net, for (bivariate) Principal Component
scatter plots (+histograms), "plotpc" [1] is the one I like most.
By default it performs PCA on a bivariate dataset based on R's "princomp()"
(which is the eigenvector-based algebraic solution to PCA). I would like to
modify "plotpc()" in order be able, as an end-user, to define whether the PCA
should...
2010 Jun 28
2
Note on PCA (not directly with R)
Dear all, I am looking for some interactive study materials on Principal
component analysis. Basically I would like to know what we are actually
doing with PCA? What is happening within the dataset at the time of doing
PCA.
Probably a 3-dimensional interactive explanation would be best for me.
I have gone through some online materials specially Wikipedia etc, however
what I need a "movable
2010 Jun 30
3
Factor Loadings in Vegan's PCA
Hi all,
I am using the vegan package to run a prcincipal components analysis
on forest structural variables (tree density, basal area, average
height, regeneration density) in R.
However, I could not find out how to extract factor loadings
(correlations of each variable with each pca axis), as is straightforwar
in princomp.
Do anyone know how to do that?
Moreover, do anyone knows