pca: A fitted multivariate functional principal component analysis (MFPCA) object of class pca_mfd.
harm: A vector of integers with the harmonics to plot. If 0, all harmonics are plotted. Default is 0.
scaled: If TRUE, eigenfunctions are multiplied by the square root of the corresponding eigenvalues, if FALSE the are not scaled and the all have unit norm. Default is FALSE
Returns
A ggplot of the harmonics/multivariate functional principal components contained in the object pca.