# create 'mpos' and 'dists'
gv2mpos(gmap,v)
# extract 'xid' on chromosome 'k'
xid1ch(mpos,v,k)
# extract covariate effects of a mtcmim object 'object'
xeff(a,xid)
# extract QTL effect from a mtcmim object 'object'
qeff(object)mtcmim object.mtcmim object.mtcmim and sureEst.