library(Rmixmod)
data(iris)
data <- iris[, 1:4]

labels <- c(rep(1, 40), rep(2, 70), rep(3, 40))

# strategy = new("Strategy", initMethod="partition", labels=labels)
strategy <- mixmodStrategy(initMethod = "label", labels = labels)

out <- mixmodCluster(data, nbCluster = 3, strategy = strategy)