zeroIBD: Probability of zero IBD
In ibdsim2: Simulation of Chromosomal Regions Shared by Family Members

Description Usage Arguments Value Examples

Estimate the probability of no IBD sharing in a pairwise relationship.

1	zeroIBD(sims, ids = NULL, threshold = 0)

`sims`	A list of genome simulations, as output by `ibdsim()`.
`ids`	A vector with two ID labels. If NULL (default), these are deduced from the `sims` object.
`threshold`	A nonnegative number (default:0). Only IBD segments longer than this are included in the computation.

A list with the following two entries:

zeroprob: The fraction of sims in which ids have no IBD sharing
stErr: The standard error of zeroprob

###
# The following example computes the probability of
# no IBD sharing between a pair of fourth cousins.
# We also show how the probability is affected by
# truncation, i.e., ignoring short segments.
###

# Define the pedigree
x = cousinPed(4)
cous = leaves(x)

# Simulate (increase N!)
s = ibdsim(x, N = 10)

# Probability of zero ibd segments. (By default all segs are used)
zeroIBD(s, ids = cous)

# Re-compute with positive threshold
zeroIBD(s, ids = cous, threshold = 1)