Plot method for variable domain multivariate FPCA

Displays either the estimated eigenfunctions of one variable at several fixed domain lengths (superimposed lines), a heatmap of one eigenfunction across all domains, or the multivariate scores colored by domain length.

Usage

# S3 method for class 'mfpca_vd'
plot(
  x,
  type = c("eigenfunctions", "heatmap", "scores"),
  variable = 1,
  components = 1:2,
  domains = NULL,
  align_sign = TRUE,
  ...
)

Arguments

x: An object of class mfpca_vd.
type: One of "eigenfunctions" (the default), "heatmap" or "scores". "eigenfunctions" draws the chosen components at a few fixed domains as superimposed lines, "heatmap" shows one component across all domains, and "scores" plots the multivariate scores colored by domain length.
variable: Index of the functional variable to display when type = "eigenfunctions" or type = "heatmap" (default 1).
components: Indices of the components to display (default 1:2). For type = "heatmap" only the first one is used.
domains: Domain lengths at which to draw the eigenfunctions. If NULL, a few values spanning the observed domains are used.
align_sign: If TRUE (the default), the sign of each eigenfunction is aligned across domains so the curves overlay consistently.
...: Further graphical arguments.

Value

Called for its side effect (a plot). Invisibly returns NULL.