pfr_plot.gam, which is our local copy of
plot.gam with some minor changes.## S3 method for class 'pfr':
plot(x, Qtransform = FALSE, ...)pfr-objectTRUE indicates the
coefficient should be plotted on the quantile-transformed scale, whereas
FALSE indicates the scale of the original data. Note this is
different from the Qtransformplot.gamaf, pfr