How to downproject with PCA in R?

StackOverflow https://stackoverflow.com/questions/22770875

  •  24-06-2023
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Question

How to downproject with PCA in R?

When I use princomp function on my data it creates as many principal components as there are dimensions in the original data. But how can I down-project, let's say if I have 10 dimensional data and I want to downproject to 2 dimensions?

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Solution

if you mean doing PCA and keeping just a few of the components (dimensions) then one way is to use principal in package psych. (Using the argument nfactors)

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