Gets the indices of homologous sera for each antigen in an antigenic map.
See also the function srHomologousAgs() for getting and setting the
homologous antigens reciprocally.
agHomologousSr(map)An acmap object
A list, where each entry is a vector of indices for homologous sera, or a length 0 vector where no homologous serum is present
Other antigen and sera attribute functions:
agAttributes,
agGroups(),
agLabIDs(),
agSequences(),
ptAnnotations,
ptClades,
srAttributes,
srGroups(),
srHomologousAgs(),
srSequences()