Basically reapply rotation to a new Coe object.
Examples
b <- filter(bot, type=="beer")
w <- filter(bot, type=="whisky")
bf <- efourier(b, 8)
#> 'norm=TRUE' is used and this may be troublesome. See ?efourier #Details
bp <- PCA(bf)
wf <- efourier(w, 8)
#> 'norm=TRUE' is used and this may be troublesome. See ?efourier #Details
# and we use the "beer" PCA on the whisky coefficients
wp <- rePCA(bp, wf)
plot(wp)
#> will be deprecated soon, see ?plot_PCA
plot(bp, eig=FALSE)
#> will be deprecated soon, see ?plot_PCA
points(wp$x[, 1:2], col="red", pch=4)