pairSum: Combine person-specific covariates to pair-specific
Description
Functions to combine person-specific covariates to pair-specific
Usage
pairSum(cov1, cov2)
pairDiff(cov1, cov2)
Arguments
cov1
cov2
Value
Either the sum or the difference (absolute) of the two covariates
Details
For use within the ibdreg package to make covariates that are a function
of the two covariates in a relative pair. These functions are to be
used in the formula parameter of ibdreg, and the pair-specific
covariates can be expressed as pairSum(cov) or pairSum(cov, cov).