simulate_gen_assoc: Provide a quick report on the simulation of parental pairs...
In ijwilson/gencorram: Simulate Genetic Correlations by Associative Mating

This report is only for a single generation

simulate_gen_assoc(
  am_corr_coeff,
  ntrait_loci,
  nloci,
  envir_var,
  pop_size,
  generations,
  ntraining,
  af_r_func = runif
)

`am_corr_coeff`	The associative mating correlation coefficent
`ntrait_loci`	The number of loci for each trait
`pop_size`	The Size of the populations to simulate. Equal numbers of males and females of this size.
`generations`	The number of generations to run the simulation.
`ntraining`	The size of the training data set
`af_r_func`	A function of one variable (n) that returns a vector of allele frequencies of length n
`n_loci`	The number of loci to simulate.
`environ_var`	environmental variance. A vector of length 1 or 2.