ztnb_em.py 文件源码

def score_fun_first_term(vals_hist,a_mid):
    sum = 0.0
    lim = int(np.max(vals_hist.keys()))
    for i in range(0, lim+1):
        if (vals_hist[i] > 0):
            inner_sum = 0.0
            for j in range(0, i):
                inner_sum += j/(1.0 + a_mid*j)
            sum += vals_hist[i]*inner_sum

    return sum 


##############################  
## in-line functions
##############################