Dear Sir, I am using package"ropls" to generate PCA Plot. I would like to change the labels name to symbol and change the font size of x- and y- axis. In addition, we would like to have the 2 ellipses of vector. How to define.

my data is below

>library(ropls)
>metadata <- as.fator(metadata)

>pDiacPCA.pca <- opls(pDiacPCA, plotL = TRUE)

>plot(pDiacPCA.pca, typeVc="x-score", parAsColFcVn = metadata, parEllipsesL = TRUE, parDevNewL = FALSE, parCex - 1.2)