#' @param Y matrix of responses (of size n*m)
#'
#' @return a list with phiInit, rhoInit, piInit, gamInit
#' @param Y matrix of responses (of size n*m)
#'
#' @return a list with phiInit, rhoInit, piInit, gamInit
initSmallEM <- function(k, X, Y, fast)
{
n <- nrow(X)
initSmallEM <- function(k, X, Y, fast)
{
n <- nrow(X)
if (length(Z_indice) == 1) {
betaInit1[, , r, repet] <- MASS::ginv(crossprod(t(X[Z_indice, ]))) %*%
crossprod(t(X[Z_indice, ]), Y[Z_indice, ])
if (length(Z_indice) == 1) {
betaInit1[, , r, repet] <- MASS::ginv(crossprod(t(X[Z_indice, ]))) %*%
crossprod(t(X[Z_indice, ]), Y[Z_indice, ])