[R] Calculating different PCAs in R

[im db]

Dear All, I want to use princomp() function in R in order to calculate Principle Component Analysis.In different papers, I have seen "PCA 1", "PCA 2", "PCA 11" , etc. Would you please tell me how can i calculate different PCAs in R?At the moment i just use this line "eigenVectors <- pca$loadings"But I don’t know if it is correct to use loadings.Thank you in advance.  Best regards,
Iman Dabbaghi

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