Plot PCA or O-PLS loadings — plotload

Visualisation of loadings using scatter plot

plotload_cat(obj, pc, an, title = NULL, legend = TRUE, ...)

Arguments

obj	PCA or OPLS object from packages metabom8 or MetaboMate
pc,	num vector descrbing which components to visualise in on abcissa and ordinate (in case of OPLS the first element in pc is ignored as abcissa always shows predicted component)
an	list, three elements describing colour, point shape and point labels (all is aes context)
title	Plot title
legend	logical, indicating if legend should be included (legend takes up too much space when high number of categorical varaibles)
...	Optional arguments passed to `geom_point()`

data.frame containing H.T2 ellipse cooredinates

Geladi, P and Kowalski, B.R. (1986), Partial least squares and regression: a tutorial. Analytica Chimica Acta, 185, 1-17.