vector of character, which specifies
the variables to be included into ProbABEL
phenotype-file. Should contain, and start with 'id'
column, which should provide the same ID codes as these
in gendata
phedata
phenotypic data (matrix, data.frame, or
gwaa.data-class object)
gendata
genetic data to be used with ProbABEL,
either databel-class object or name of the (index/data)
file containing filevector data for ProbABEL