internals_for_qqplot: Internal functions for qqplot of package distrMod

Description

These functions are used internally by qqplot of package distrMod.

Usage

.labelprep(x,y,lab.pts,col.lbl,cex.lbl,which.lbs,which.Order,order.traf)

Arguments

a (numeric) vector

a (numeric) vector of same length as x

cex.lbl

magnification factor for the plotted observation labels

col.lbl

color for the plotted observation labels

lab.pts

character or NULL; observation labels to be used

which.lbs

integer or NULL; which observations shall be labelled

which.Order

integer or NULL; which of the ordered (remaining) observations shall be labelled

order.traf

function or NULL; an optional trafo by which the observations are ordered (as order(trafo(obs)).

Value

.labelprepa list with components x0 (the thinned out and ordered vector x), y0 (the thinned out and ordered vector y), lab (the thinned out and ordered vector of labels lab.pts), col (the thinned out and ordered vector of colors col.lbs), cex (the thinned out and ordered vector of magnification factors cex.lbs).

concept

utilities

Details

.labelprep prepares the labels for later output: first we (optionally) select some indices among x according to which.lbs, then orders both x and y according to the order of the remaining (optionally transformed by order.traf) values of x (decreasing); finally only the order statistics (w.r.t. the preceding ordering) as specified in which.Order are returned; correspondingly, labels, colors, and magnification factors, are ordered respectively thinned out.