1# File src/library/stats/R/qqplot.R 2# Part of the R package, https://www.R-project.org 3# 4# Copyright (C) 1995-2012 The R Core Team 5# 6# This program is free software; you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation; either version 2 of the License, or 9# (at your option) any later version. 10# 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15# 16# A copy of the GNU General Public License is available at 17# https://www.R-project.org/Licenses/ 18 19qqplot <- function(x, y, plot.it = TRUE, 20 xlab = deparse1(substitute(x)), 21 ylab = deparse1(substitute(y)), ...) 22{ 23 sx <- sort(x) 24 sy <- sort(y) 25 lenx <- length(sx) 26 leny <- length(sy) 27 if( leny < lenx ) 28 sx <- approx(1L:lenx, sx, n = leny)$y 29 if( leny > lenx ) 30 sy <- approx(1L:leny, sy, n = lenx)$y 31 if(plot.it) 32 plot(sx, sy, xlab = xlab, ylab = ylab, ...) 33 invisible(list(x = sx, y = sy)) 34} 35