initialize_containers: Function to initialize containers
In lcomm/ltools: Helper Functions

Initialize containters for regression coefficients, acceptance, and imputed

1	initialize_containers(R, n, coef_U, coef_M, coef_Y, thin = 1, imp_U = FALSE)

`R`	Number of MCMC scans
`coef_U`	Vector containing seed values for U coefficients
`coef_M`	Matrix containing seed values for M coefficients
`coef_Y`	Vector containing seed values for Y coefficients
`thin`	How much to thin container for imputed Us
`imp_U`	Whether to save imputed U's. Defaults to FALSE.