gen_data_dual: gen_data_dual
In jtm508/bayestraj:

Generate data for a dual trajectory model

1 2	gen_data_dual(N, T1, T2, pi1, pi2, beta1, beta2, sigma1, sigma2, poly = 1, scale = FALSE)

`N:`	Integer, number of tandems
`T1:`	Integer, number of time periods in series 1
`T2:`	Integer, number of time periods in series 2
`pi1:`	Vector, probability of being assigned to each group in series 1
`pi2:`	Matrix, transition matrix. Row j is the transition probabilities for when the series 1 group is j
`beta1:`	Matrix, coefficients for each group in series 1
`beta2:`	Matrix, coefficients for each group in series 2
`sigma1:`	Float, variance for outcomes in series 1
`sigma2:`	Float, variance for outcomes in series 2
`scale:`	Boolean, TRUE to scale design matrix