Helper function to calculate transition porbabilities for 15-state joint HMM cn/phase are sclars, only p_s is vectorized
get_trans_probs_s15(t, p_s, w, cn_from, phase_from, cn_to, phase_to)
numeric; transition probability
numeric; CNV state transition probability
numeric; phase switch probability
numeric; relative abundance of states
character; originating CNV state
character; originating haplotype phase state
character; destination CNV state
character; destination haplotype phase state