grav2 <- read_cross2(system.file("extdata", "grav2.zip", package="qtl2"))
map <- insert_pseudomarkers(grav2$gmap, step=1)
probs <- calc_genoprob(grav2, map, error_prob=0.002)
phe1 <- grav2$pheno[,1,drop=FALSE]
phe2 <- grav2$pheno[,2,drop=FALSE]
out1 <- scan1(probs, phe1) # phenotype 1
out2 <- scan1(probs, phe2) # phenotype 2
out <- cbind(out1, out2)
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