Extract landmark coordinates from a Nystrom krls fit

Returns the m x d matrix of landmark coordinates used by a fit built with approx = "nystrom". Internally landmarks live in standardized X-space; the default scale = "original" undoes the standardization using the training X's centers and SDs.

Usage

get_landmarks(fit, scale = c("original", "standardized"))

Arguments

fit

A krls_rr fit built with approx = "nystrom".

scale

Either "original" (default) or "standardized".

Value

Numeric matrix of dimension nystrom_m x ncol(X_train).