I'm sorry, this is probably a very simple question. I am relatively new to R and am having difficulty understanding how to use the mclust options to change the prior probabilities for a mixture model. I am dealing with a situation where I have 2 groups of data and it is known that the sample sizes are different in the population. I want to incorporate the probability associated with each group into the mixture model to obtain better classification. My current syntax is simply mclust(data, G=2) How can I modify this if I want to best represent a group split of 20 in group 1 and 80 in group 2?