tests/test_qtl.R

In qtl: Tools for Analyzing QTL Experiments

######################################################################
#
# test_qtl.R
#
# copyright (c) 2009, Karl W Broman, Pjotr Prins
# first written July 2009
#
#     This program is free software; you can redistribute it and/or
#     modify it under the terms of the GNU General Public License,
#     version 3, as published by the Free Software Foundation.
#
#     This program is distributed in the hope that it will be useful,
#     but without any warranty; without even the implied warranty of
#     merchantability or fitness for a particular purpose.  See the GNU
#     General Public License, version 3, for more details.
#
#     A copy of the GNU General Public License, version 3, is available
#     at http://www.r-project.org/Licenses/GPL-3
#
# Some basic regression/integration testing for some of the QTL mapping routines
#
# You can run it with:
#
#   R --no-save --no-restore --no-readline --slave < ./tests/test_qtl.R 

######################################################################

library(qtl)

version = mqm_version()
cat("R/qtl=",version$RQTL)
cat("R-MQM=",version$RMQM)
cat("MQM=",version$MQM)


data(listeria)
if (nind(listeria)!=120) stop("Number of individuals incorrect")

# ---- a quick test of standard R/qtl scanone
mr = scanone(listeria, method='mr')
test = round(mr[15,]$lod*1000)
cat(mr[15,]$lod,test)
if (test != 966) stop("scanone_mr gives an incorrect result")

# ---- a quick test of MQM for R/qtl
augmentedcross <- mqmaugment(listeria, minprob=1.0, verbose=TRUE)
nind = nind(augmentedcross)
if (nind!=120) stop("Number of individuals incorrect: ",nind)
result <- mqmscan(augmentedcross, logtransform=TRUE, outputmarkers = FALSE,off.end=0)
test1 = round(result[5,5]*1000)
test2 = round(max(result[,5]*1000))
cat("test1 = ",test1,"\n")
cat("test2 = ",test2,"\n")
if (test1 != 76) stop("MQM gives an unexpected result (1)")
if (test2 != 5384) stop("MQM gives an unexpected result (2)")

# ---- Test for negative markerlocations
data(hyper)
hyper <- fill.geno(hyper)
#Mess up the markers by shifting
temp <- shiftmap(hyper, offset=10^7)
out.temp <- mqmscan(temp,verb=TRUE,off.end=10)
if(!(rownames(out.temp)[3]=="D1Mit296")) stop("MQM something wrong with positive shifts in location")
#Mess up the dataset by moving 1 marker infront of the chromosome
hyper$geno[[1]]$map[1] <- -10
res <- mqmscan(hyper,verbose=T,off.end=100)
if(any(is.na(res[,3]))) stop("MQM failed to handle negative locations correctly")
if(!(rownames(res)[2]=="c1.loc-95")) stop("MQM something wrong with negative locations")   #to -15 because off.end defaults to 10


cat("Version information:\n")
cat("R/qtl = ",version$RQTL,"\n")
cat("R-MQM = ",version$RMQM,"\n")
cat("MQM   = ",version$MQM,"\n\n")

cat("test_qtl.R tests succesfully run!")