how to show all the sample principal component plots in R ?

Question

I noticed something in R , say pc is the result of applying PCA to a data matrix and pc$x is my sample principal component matrix .

when try plot(pc$x) , it will only plot the first principal component (pc1) against the second (pc2) , but I actually have more than 2 principal components. how do I show all of them ?

Answer 1

All combinations in a single plot:

pairs(pc$x)

To select a specific combination just use:

plot(pc$x[, c(1,3)])  # e.g. pc1 and pc3