test SNP A1 A2 B1 B2 betaA betaB fA fB note
a A G A G 1 1 0.5 0.5 1 fine
b A G G A 1 1 0.5 0.5 -1 to_swap
c A G T A 1 1 0.5 0.5 0 incompatible
d A T A T 1 1 0.2 0.8 -1 to_flip_and_swap
e A T A T 1 1 0.2 0.2 1 fine
f A T A T 1 1 0.5 0.5 1 palindromic
g A T T A 1 1 0.5 0.5 -1 palindromic_to_swap
h C G G C 1 1 0.2 0.2 1 to_flip
i G T A C 1 1 0.5 0.5 -1 to_flip_and_swap
j G T C A 1 1 0.5 0.5 1 to_flip
k A G A G 1 1 0.2 0.2 1 fine
l T G G T 1 1 0.2 0.8 -1 to_swap
