Array_like.
An array with two values indicating the two PCs which should be used for plotting.
By default the first two PCs are used, e.g., \(c(1,2)\).
groups
Factor, optional.
Factor indicating groups.
alpha
Scalar, optional.
Alpha transparency for scatter plot.
ellipse
Bool (\(TRUE\), \(FALSE\)), optional.
Draw a 1sd data ellipse for each group, if \(TRUE\).
alpha.ellipse
Scalar, optional.
Alpha transparency for ellipse.
ind_labels
Bool (\(TRUE\), \(FALSE\)), optional.
Plot names for each individual point, if \(TRUE\).
ind_labels.names
Array_like, optional.
User specific labels for the individual points.