t[,1]	t[,2]	t[,3]	y[,2]	y[,3]	se[,2]	se[,3]	na[]	V[]
1	3	NA	-0.31	NA	0.668089651	NA	2	0.253518519
1	2	NA	-1.7	NA	0.382640605	NA	2	0.079593023
3	4	NA	-0.35	NA	0.441941738	NA	2	0.0703125
3	4	NA	0.55	NA	0.555114559	NA	2	0.1125
4	5	NA	-0.3	NA	0.274276316	NA	2	0.038949635
4	5	NA	-0.3	NA	0.320087245	NA	2	0.039937662
1	2	4	-2.3	-0.9	0.71774604	0.694988091	3	0.254736842